Search: The equilibrium constant for the reaction is at 300 . Pure is placed in a 1.00- flask and allowed to reach equilibrium at this temperature. There are 1.05 in the equilibrium mixture

Number of results: 28,101

Chemistry
SO this is my first time doing this... lol i need help on an AP chemistry question for equilibrium. A 0.500 L tank contains 3.00 g of NO(g) at 750. K. The equilibrium constant for the reaction below at this temperature is 3.4 x 10 -3 2NO(g) ⇌ N2(g) + O2(g) (a) write ...
Monday, April 9, 2012 at 8:56pm by Sam

Chemistory
The reaction has an equilibrium constant of = 0.154. If 6.60 of , 4.30 of , and 11.60 of are added to a reaction vessel with a volume of 5.30 , what net reaction will occur? A-The reaction will proceed to the left to establish equilibrium. B-The reaction will proceed to the ...
Thursday, April 18, 2013 at 2:12pm by Anonymous

Chemistry
One enzyme- catalyzed reaction in a biochemical cycle has an equilibrium constant (K1) that is 10 times the equilibrium constant (K2) of a second reaction. If the standard Gibbs energy of the former reaction is - 300 kJ mol-1, what is the standard reaction Gibbs energy of the ...
Tuesday, April 10, 2012 at 8:29am by harry

chemistry
Concerning the following reaction at equilibrium: 3Fe(s) + 4H2O(g) Fe3O4(s) + 4H2(g), increasing the concentration of the Fe(s) would: Answer A. Shift the equilibrium to the right B. Shift the equilibrium to the left C. No change D. Increase the value of the equilibrium ...
Saturday, July 21, 2012 at 11:21pm by ken

chemistry
given the equilibrium constant for the following reaction at 500 K, 2 NO (g) + O2 (g) <==> 2 NO2 (g) Kc = 6.2x10^5 calculate the equilibrium constant for the reaction expressed as partial pressures, Kp. the answer is 1.51x10^4. How do i get this?
Wednesday, March 28, 2012 at 5:00pm by alex

chem
Given the concentrations, calculate the equilibrium constant for this reaction: I2(g) + Cl2(g)---> 2ICl(g) At equilibrium, the molar concentrations for reactants and products are found to be I2 = 0.50M, Cl2 = 0.60M, and ICl = 5.0M. What is the equilibrium constant (Kc) ...
Wednesday, November 14, 2012 at 3:24pm by byke

chemistry
For the following reaction, 2SO3(g) = 2SO2(g) + O2(g), the equilibrium constant, Kp, is 1.32 at 627 degrees Celsius. What is the equilibrium constant for the reaction: SO3(g) = SO2(g)+ 1/2 O2(g)
Sunday, July 22, 2012 at 7:14pm by Erka

CHEMISTRY
the equilibrium composition of a reaction is 1.522mol CO, 1.566mol H2, 0.478mol CH4 and 0.478mol H2O and the volume of the reaction vessel is 10Litres. -What is the equation for the reaction? -Calculate the equilibrium constant for both the forward and reverse reaction?
Tuesday, April 5, 2011 at 4:03am by Taynell

chemistry
For the reaction at equilibrium: 3Fe(s) + 4H2O(g) Fe3O4(s) + 4H2(g), removing some of the product, Fe3O4(s), would: Answer A. Increase the value of the equilibrium constant, K B. No change C. Decrease the value of the equilibrium constant, K D. Shift the equilibrium to the ...
Saturday, July 21, 2012 at 11:21pm by ken

Chemistry
The equilibrium constant Kc for the following reaction is equal to 0.20 at 250°C. Calculate the equilibrium constant Kp for the reverse reaction at the same temperature. COCl2 (g) = CO (g) + Cl2 (g) My Answer: To find the reverse reaction of Kc, it should be 1/0.2 = 5, so ...
Sunday, March 18, 2012 at 10:16pm by Raskin

Chem Class
The equilibrium constant for reaction 1 is K.....? how do i figure out problems like this? do i check which ones cancel out? The equilibrium constant for reaction 1 is K. The equilibrium constant for reaction 2 is ___? (1) SO2 (g) + (1/2) O2 (g) (right and left arrows)SO3 (g...
Monday, October 25, 2010 at 6:59pm by Awr

Chemstry
For the reaction A(g) + B(g) <==> C(g) + D(g) the equilibrium constant K is defined as K = Y(sub y) * Y(sub D) / (Y (sub A) * Y(sub b)) where y is the molar fraction of the gas phase of a species At 620.00 K, the equilibrium constant is 1.100. Suppose the feed to...
Wednesday, July 11, 2012 at 12:32am by Simon

Chem II
The equilibrium constant of a reaction is 12.6. If the rate constant of the reverse reaction is 5.1 x 10 -2 the rate constant for the forward reaction is _____ 0.32 0.16 0.64 0.08 I don't even know where to start on this question. Any direction will help
Monday, June 16, 2008 at 9:57pm by Ken

chemistry
the equilibrium constant is the ration of product concentration to reactant concentration at equilibrium. a reaction will likely go to completion if the equilibrium constant is what?
Saturday, January 22, 2011 at 9:37am by brandi

Chemistry chemical equilibrium
1.25 mol of NOCl was placed in a 2.50 L reaction chamber at 427 celciciu degre . After equilibrium was reached, 1.1 mole of NOCl remained. Calculate the equilibrium constant Kc for the reaction
Saturday, February 18, 2012 at 2:50am by Abdela

chemistry
If the equilibrium constant for the conversion of isobutane to n-butane is 2.5 what is the value of the equilibrium constant for the reverese reaction?
Tuesday, April 1, 2008 at 3:29am by Jennifer

chem
a.) At equilibrium, the molar concentrations for reactants and products are found to be [I2] = 0.50 M,[Cl2] = 0.60 M, and [ICl] = 5.0 M. What is the equilibrium constant (Kc) for this reaction? b.) The concentration of I2 is increased to 1.5 M, disrupting equilibrium. ...
Monday, November 19, 2012 at 12:26pm by Tracy

Chemistry
Need help in AP chemistry on Equilibrium When heated, hydrogen sulfide gas decomposes according to the equation 2 H2S(g) ⇄ 2 H2(g) + S2(g) A 3.40 g sample of H2S(g) is introduced into an evacuated rigid 1.25 L container. The sealed container is heated to 483 K, and 3...
Monday, April 9, 2012 at 8:58pm by Sam

chem
When the concentration of I2 is increased to 1.5 M, the ratio of products to reactants is 28. The equilibrium constant for the reaction is 83. In which direction will the reaction shift to regain equilibrium?
Monday, November 19, 2012 at 4:55pm by tracy

Chemistry
A catalyst changes the rate of a reaction because it lowers the activation energy of the reaction and makes alternative pathways available. But it does not change Keq, the equilibrium constant, because it doesn't change the concn of the products or the reactants. It just ...
Wednesday, April 9, 2008 at 10:27pm by DrBob222

Chemistry
For the reversible, one-step reaction A + B ARROW C + D, the forward rate constant is 35.9 1/(M·h) and the rate constant for the reverse reaction is 25.4 1/(M·h). The activation energy was found to be 33.0 kJ/mol for the forward reaction and 45.6 kJ/mol for the ...
Wednesday, June 13, 2012 at 9:50pm by parker

Science
The following reaction: 2SO3 (g) ! 2SO2 (g) + O2 (g) has an equilibrium constant equal to 0.23 M. If the following concentrations are present: [SO2] =0.480 M, [O2] = 0.561 M, [SO3] = 0.220 M, is the reaction at equilibrium? If not, which way must it shift to reach equilibrium?
Thursday, June 30, 2011 at 11:15pm by Abby

chemistry
A catalyst changes the RATE of a reaction, because it allows an alternative pathway for the reaaction to take place. Therefore, the reaction you have written may reach equilibrium faster, due to this increased rate; however, Keq (the equilibrium constant) remains the same and ...
Thursday, December 6, 2007 at 3:31pm by DrBob222

Chemistry
8. For the reaction H2(g)+I2(g)„\2HI(g); [H2] = 0.95 M; [I2] = 0.78 M; [HI] = 0.27 M. Calculate the equilibrium constant K and describe the direction (forward or reverse) of the reaction. Will adding a catalyst to the reaction alter the direction of the reaction? Why? ...
Monday, March 29, 2010 at 11:48am by Kathleen

chemistry
Determine the expression for the equilibrium constant for this equilibrium reaction: 2NO(g) + 2CO(g) (arrows)(in equilibrium with) N2(g) + 2CO2(g) PLease help anyone i really apreciate it Beccy
Saturday, January 8, 2011 at 8:35am by rebecca niles

Chemistry
A chemist trying to synthesize a particular compound attempts two different synthesis reactions. The equilibrium constants for the two reactions are 23.3 and 2.2 X 10^4 at room temp. However, after 15minutes the chemist finds that the reaction with the smaller equilibrium ...
Wednesday, February 8, 2012 at 12:10am by L.Bianchessi

chemistry
I am given the following reaction: 2NH3(g) -------> N2(g) + 3H2(g) My question is: 6.4 mols of ammonia gas has been put into a 1.7 L flask and has been permitted to reach equilibrium in accordance to the reaction listed above. If the equilibrium mixture has 4.2 mols of ...
Monday, May 26, 2008 at 7:17pm by Shivani

Chemistry
The equilibrium constant, Kc is 3.2 x10 -34 at 25C for the reaction 2 HCl(g) <=> H2(g) + Cl2(g). what is The equilibrium expression, Kc for the reaction
Wednesday, April 27, 2011 at 5:26pm by Donna

Chemistry
For the reaction 2NH3(g) 3H2(g) N2(g) at 472oC equilibrium is established when [H2] =0.0200M, [N2] = 0.0100M and [NH3] = 5.37x10^_8 M. What is the equilibrium constant for the reverse reaction?
Monday, July 16, 2012 at 12:58pm by joe

general science
Reactants --> Products {True} products = reactants {True} If atoms cannot be destroyed then the mass of reactants must equal the mass of the products in a chemical reaction Some chemical and physical changes can reach equilibrium. At equilibrium the rate of the forward ...
Thursday, December 24, 2009 at 11:42am by Heart

chemistry
A classic experiment in equilibrium studies dating from 1862 involved the reaction in solution of ethanol and acetic acid to produce ethyl acetate and water. The reaction can be followed by analyzing the equilibrium mixture for its acetic acid content. In one experiment, a ...
Sunday, March 13, 2011 at 5:44am by gs

chem
Reaction H2 +I2 yields 2HI All three gases are initially at 0.1atm/ upon reaching equilibrium it is found that H2 pressure droped by 55% what is the equilibrium constant for this reaction.
Sunday, December 26, 2010 at 6:07pm by Anonymous

chemistry
The equilibrium constant Kc for the reaction C <--> D + E is 7.90 * 10^-5. The initial composition of the reaction mixture is [C]=[D]=[E]=1.10*10^-3. What is the equilibrium concentrations of C, D, and E? C=? D=? E=?
Sunday, November 4, 2012 at 10:51pm by Brunette

Chemistry(Please check answer)
The equilibrium constant for the reaction, H2(g) + I2(g) == 2 HI(g) is 54.9 at 699.0 K (Kelvin). What is the equilibrium constant for 4 HI(g) == 2 H2(g) + 2 I2(g) under the same conditions? Note: the == indicates the equilibrium double arrow Since the second equation is ...
Wednesday, March 14, 2012 at 8:30pm by Hannah

Chemistry
At the start of the reaction there are 0.714 mole of H2, 0.984 mole of I2, and 0.886 mole of HI in a 2.70 L reaction chamber. Calculate the concentrations of the gases at equilibrium. The equilibrium constant is 54.3.
Saturday, February 23, 2013 at 7:03pm by Amy

chemistry
The correct interpretation of the equation below is: Fe3+(aq) + SCN–(aq) --> FeSCN2+(aq) A. At equilibrium, the rate of the forward reaction equals the rate of the reverse reaction. B. The equilibrium constant is Kc = [Fe3+][SCN–][FeSCN2+] C. A heterogeneous ...
Thursday, April 10, 2008 at 1:49am by Jerome

chemistry
The correct interpretation of the equation below is: Fe3+(aq) + SCN–(aq) --> and <-- FeSCN2+(aq) A. A heterogeneous equilibrium exists because of the charged ions. B. At equilibrium, the rate of the forward reaction equals the rate of the reverse reaction. ...
Wednesday, April 9, 2008 at 3:12pm by Lindsey

Chemistry
In the industrial synthesis of ammonia, the equilibrium constant expression may be written as: Keq= [NH3]^2/[N2][H2]^3 Calculate the value of this equilibrium constant, if the equilibrium concentration of nitrogen in the reaction mixture at 600°C if [N2] = 4.53 and [H2] = ...
Friday, November 18, 2011 at 12:24am by Chemistry Chick

chemistry
Write an equilibrium constant expression for the chemical reaction of ammonia with water. (In this reaction assume that the concentration of water will remain constant)
Saturday, June 12, 2010 at 11:09pm by Locke

chem
1) If more reactant is added to a gaseous reaction at equilibrium, what will happen to the value of the equilibrium constant? a. it will increase b. it will decrease c. it will remain the same d. it can either increase or decrease 2) Which of the following describes a property...
Wednesday, February 1, 2012 at 9:13pm by HEATHER

Chemistry
If a catalyst is added to a system at equilibrium and the temperature and pressure remain constant there will be no effect on the: (1) rate of the forward reaction (2) rate of the reverse reaction (3) activation energy of the reaction (4) heat of reaction 4, am i right ?
Wednesday, March 9, 2011 at 3:53pm by Jazmin F.

chemistry
A 2.30 mole quantity of NOCl was initially in a 1.50 L reaction chamber at 400°C. After equilibrium was established, it was found that 20.0 percent of the NOCl had dissociated: 2NOCl(g) 2NO(g) + Cl2(g) Calculate the equilibrium constant Kc for the reaction.
Thursday, March 17, 2011 at 2:10am by Anonymous

chemistry
The correct interpretation of the equation below is:? Fe3+(aq) + SCN¨C(aq)¡ú FeSCN2+(aq) A. The reaction is incomplete because the product is still charged. B. A heterogeneous equilibrium exists because of the charged ions. C. The equilibrium constant is Kc...
Thursday, April 10, 2008 at 9:59pm by david

Chemistry Equilibrium Constant
The initial pressures for I2 (g), H2(g), and HI(g) were Pi2 = 0.100 atm, Ph2 = 0.200 atm, and Phi = 0 atm, respectively. After the system came to equilibrium, the pressure of I2 (g) became very low, PI2 = 1.00 x 10^-5 atm. Calculate the equilibrium constant Kp for this reaction
Sunday, March 18, 2012 at 11:15pm by Raskin

Chemistry
Consider the reaction 2 SO2 + O2 in equilibrium with 2 SO3 . At 25°C Ho = -197.78 kJ and So = -187.95 J/K. Using this information, calculate the equilibrium constant for the reaction at 50°C. (R = 8.314 J/K) Enter your answer using TWO significant figures.
Wednesday, April 6, 2011 at 11:53pm by Laura

chemistry
Stearic acid, nature's most common fatty acid, dimerizes when dissolved in hexane: 2C17H35COOH Picture (C17H35COOH)2; ΔH°rxn = -172 kJ The equilibrium constant for this reaction at 28°C is 2900. Estimate the equilibrium constant at 38°C.
Thursday, March 8, 2012 at 3:27pm by lisa

chemistry reaction rate
You will need to add a catalyst. 'nic' is not correct as changing the P or concentrations will only change the position of the equilibrium. Increasing the temperature will bring the reaction to equilibrium more quickly, but will decrease the equilibrium yield as it is ...
Sunday, January 9, 2011 at 8:52pm by Dr Russ

apchemistry
The numerical value of the concentration equilibrium constant for the gaseous reaction 2 SO2 + O2 *) 2 SO3 is 0.5 at temperature T. When a reactionmix- ture is brought to equilibrium, [O2] is found to be 2.0 M and [SO3] is found to be 10 M. What is the equilibrium ...
Wednesday, January 30, 2013 at 5:52pm by cheri

Chemistry
The equilibrium constant for the reaction of bromine and chlorine to form bromine chloride under certain conditions is 4.7x10-2. Cl2(g) + Br2(g) --> 2BrCl(g) K= 4.7 x 10-2 What is the equilibrium constant for the following reaction under the same conditions? 1/2 Cl2(g...
Saturday, November 3, 2007 at 7:12pm by Dan

Gen Chem
At elevated temperatures, solid silicon reacts with chlorine gas to form gaseous SiCl4. At some temperature, the equilibrium constant for this reaction is 0.30. If the reaction is started with 0.10 mol of SiCl4 in a one-liter flask, how much Cl2 will be present when ...
Wednesday, February 29, 2012 at 10:11pm by jon

Chemistry
At a given temperature, the elementary reaction A <=> B in the forward direction is first order in A with a rate constant of 2.60 x 10^-2 s^-1. The reverse reaction is first order in B and the rate constant is 8.50 x 10^-2 s^-1. What is the value of the ...
Monday, March 5, 2012 at 11:37pm by Jessica

AP Chemistry
For the system 2SO2(g) + O2(g) <--> 2SO3 (g), change in enthalpy is negative for the production of SO3. At a particular temperature, 8.00 moles of sulfur dioxide and 10.00 moles of sulfur trioxide are introduced into a 2.00 L container. The system is allowed to ...
Saturday, January 12, 2008 at 10:45pm by S

chemistry... HELPP
Chemistry Equilibrium Constant PLEASE Help!? In an experiment, equal volumes of 0.00150 M FeCl3 and 0.00150 M NaSCN were mixed together and reacted according to the equation: Fe3+ (aq) + SCN– (aq) <--> Fe(SCN)2+ (aq) The equilibrium concentration of FeSCN 2...
Tuesday, October 16, 2012 at 9:38pm by LS

Chemistry
The following reaction is a step in the commercial production of sulfuric acid. 2SO2(g) + O2(g) 2SO3(g) The equilibrium constant is very high at room temperature, but the reaction is very slow. It must be run at high temperatures to achieve a reasonable rate of reaction. ...
Tuesday, October 5, 2010 at 6:35pm by Anonymous

chemistry
for the reaction S2F6 (g) 2SF2(g), the equilibrium concentrations are as follows: [S26]=0.000430M, [SF2]=2.08 M, [F2]=1.32M. the equilibrium constant is
Sunday, November 13, 2011 at 6:21pm by karen

College Chemistry 2 - Equilibrium Constants/Conc.
Calculate the equilibrium constant K(eq) for the following reaction at that temperature: 2SO2 (g) + O2 (g) = 2SO3 (g)
Friday, March 4, 2011 at 7:56pm by Lynn

Chemistry
Write the equilibrium constant expression, K, for the reaction.Then substitute the equilibrium pressures of SO2 and O2 and solve for SO3 partial pressure.
Monday, September 7, 2009 at 3:49pm by DrBob222

chemistry check my work
the equilibrium-constant expression for a reaction is kc= [N2][H2O]2 ---------- [NO]2[H2] what is the equilibrium-constant expression when the equation for this reaction is halved and then reversed? 2NO + 2H2 --> N2 + 2H2O NO + H2 ---> N + H2O N + H2O --> ...
Wednesday, April 14, 2010 at 10:02pm by Anna

chemistry
Choose all of the following statements about the equilibrium constant K that are true: (a) If the K value for a reaction is > 1 then Go must be negative for this reaction (b) A large value for K implies there is a strong driver for the reaction to proceed in the forward...
Sunday, March 28, 2010 at 4:33am by James

Chemistry
The equilibrium constant Kc for the following reaction is equal to 0.20 at 250°C. Calculate the equilibrium constant Kp for the reverse reaction at the same temperature. COCl2 (g) = CO (g) + Cl2 (g) I'm sorry.. English is a second language for me. After solving for K&#...
Thursday, March 15, 2012 at 9:55pm by David

Chem, help please
Consider the reaction N2 + 3H2 in equilibrium with 2 NH3 . At 25°C Ho = -92.22 kJ and So = -198.53 J/K. Using this information, calculate the equilibrium constant for the reaction at 226°C. (R = 8.314 J/K) Enter your answer using TWO significant figures. You may use ...
Friday, November 19, 2010 at 10:19pm by Shayne

Pchem
2 NO2(g) N2(g) + 2 O2(g) The ¥ÄH¡Æ for the reaction above is -66.4 kJ. The system is initially at equilibrium. What happens if NO2 is added to the reaction mixture at constant temperature and volume? (Select all that apply.) And here's the options. The...
Wednesday, February 17, 2010 at 6:39pm by JCY

chemistry
For the reaction 2A(g) + B(aq) + 3C(l)<------> D(s) + 3E(g), the concentrations at equilibrium are found to be: A: 2.3x10^3 Pa B: 1.8x10^-2 M C: 15.8M D: 12.5M E: 5.6x10^4 Torr Find the numerical value of the equilibrium constant that would appear in a ...
Sunday, March 10, 2013 at 7:20pm by Ashley

Chemistry
Consider the reaction 3X + Y ⇔ 2W + Z. At equilibrium, [X] is 7.0 M, [Y] is 6.0 M, [W] is 5.0 M and [Z] is 7.0 M at 298 K. The value of the equilibrium constant at this temperature is: a) 0.085 b) 0.560 c) 1.800 d) 11.760
Tuesday, May 15, 2012 at 12:48pm by Andrea

chemistry
It's a good thing you have provided the equilibrium constant Kp for that reaction. I was not able to find it. If the mixture were at equilibrium, you would have Pcl3*Pcl2/Ppcl5 = 26 In this case, that ratio is .9*.45/.012 = 33.8 There are more products than there would be ...
Sunday, March 9, 2008 at 3:46am by drwls

Chemistry
A reaction mixture of 4.0 mL of 0.002 M SCN- and 5.0 mL of 0.002 M Fe3+ is diluted to 10.0 mL with 0.1 M HNO3 to form the blood-red FeNCS2+ complex. The equilibrium molar concentration of the FeNCS2+ determined from a standardization curve is 1.5x10^-4 mol/L. Calculate, in ...
Monday, March 18, 2013 at 11:48am by Anonymous

Chemistry
Consider the following equilibrium at 1000K: 2SO2 (g) + O2 (g) ¡ê 2SO3 (g) A study of this system reveals that there are 3.5E-3 moles of sulfur dioxide gas, and 4.8E-3 moles of oxygen gas present in a 11.0L flask at equilibrium. The equilibrium constant for this ...
Sunday, June 3, 2012 at 11:03am by please help!

AP CHEMISTRY
write the equilibrium-constant expression and calculate the value of the equilibrium constant for each of the following reactions at 298 K. (a) NaHCO3(s)<--> NaOH(s) + CO2(g) Answer: Keq = PCO2 (b)Value of the Equilibrium Constant: Please help me find B
Monday, March 19, 2012 at 7:34pm by DAN

chemistry
True or False? An equilibrium constant K_c=1x10^7 for a reaction indicates that the reaction favors product formation.
Sunday, May 2, 2010 at 10:34pm by Sheila

Chemistry
I want to have the details of the experiment title: Determine the equilibrium constant of a reversible reaction involving the iodine and the tri iodate ion reaction and also determine the gibbs free energy of the reaction.
Monday, March 4, 2013 at 7:11am by Rani

Chemistry
Which of the following statements are incorrect? 1) Gases are not included in the equilibrium constant expression. 2) Equilibrium constant can be increased by adding a catalyst 3) Large equilibrium constant favors reactants 4) Equilibrium is typically achieved in a very short ...
Saturday, March 17, 2012 at 7:01pm by David

Chemistry
Consider the reaction CaSO4(s)rightleftharpoons Ca^2+(aq)+ SO_4^2-(aq) At 25 C the equilibrium constant is Kc = 2.4 \times 10^-5 for this reaction. If excess CaSO4(s) is mixed with water at 25C to produce a saturated solution of CaSO4, what are the equilibrium concentration of...
Tuesday, November 6, 2012 at 1:24am by Josh G.

AP Chemistry
Consider the following reaction. CaSO4(s) Ca2+(aq) + SO42-(aq) At 25°C the equilibrium constant is Kc = 2.4 10-5 for this reaction. (a) If excess CaSO4(s) is mixed with water at 25°C to produce a saturated solution of CaSO4, what are the equilibrium concentrations of ...
Saturday, October 20, 2012 at 2:02pm by Olivia

chemistry
At 850 K, the value of the equilibrium constant Kp for the ammonia synthesis reaction N2(g) + H2(g) <--> N2H2(g) is 0.1690. If a vessel contains an initial reaction mixture in which [N2]=0.0150 M, [H2]=0.0200 M, and [N2H2]=0.000250 M, what will the [N2H2] be when...
Monday, November 5, 2012 at 11:24am by Victoria

biochemistry
The ΔG¡' of the reaction is -5.31 kJ ámolÐ1. Calculate the equilibrium constant for the reaction. (Assume a temperature of 25¡ C.)
Sunday, February 3, 2013 at 11:49am by stoic-rider77

Chem II
PCl5 dissociates according to the reaction: PCl5(g) ↔ PCl3(g) + Cl2(g). One mole of PCl5 was placed in one liter of solution. When equilibrium was established, 0.5 mole of PCl5 remained in the mixture. What is the equilibrium constant for this reaction?
Wednesday, February 29, 2012 at 7:40pm by Sam

Chemistry
A 5.00L reaction vessel is filled with 1.00mol of H2, 1.00mol of I2, and 2.50mol of HI. If equilibrium constant for the reaction is 129 at 500k, what are the equilibrium concentrations of all species? H2(g) + I2(g) <-> 2HI(g) Kc = 129
Saturday, March 16, 2013 at 2:38pm by Presh

chemistry
One thing that you should note quickly is that the equilibrium constant expression depends on how we write the chemical reaction. For example, consider the following reaction N2O5(g) < - > 2NO2(g) + 1/2O2(g) K = [NO2]2[O2]1/2/[N2O5] However, we can just as easily...
Sunday, July 22, 2012 at 7:14pm by bobpursley

Chemistry
I'm working with a reaction of the form: A + B -> C Problem: IF the equilibrium constant is 4.2 and an equimolar mixture of A + B are reacted, verify that there will be an equilibrium yield of 67%. Here is my attempt thus far. 4.2 = [C] / ([A]*[B]) x = starting ...
Tuesday, July 22, 2008 at 1:16pm by chemstudent

Chemistry
Consider the reversible reaction: A(g)-2B(g)At equilibrium, the concentration of A is 0.381 M and that of B is 0.154 M. What is the value of the equilibrium constant, Keq?
Tuesday, November 29, 2011 at 8:15pm by Chemistry Chick

Chemistry
At 700 K, the equilibrium constant for the reaction NO2(g) « 2NO(g) + O2(g) is Kc = 4.79×10-3 (M), and the rate constant for the reaction 2NO(g) + O2(g) ® NO2(g) is k = 3.13×10^3 M^-2s^-1. What is the rate constant for the reaction NO2(g) ® 2NO(g) + ...
Monday, June 21, 2010 at 11:16pm by Miguel

ukm
The equilibrium constant (Kc) for the gas phase reaction 2 NH3 --> N2 + 3 H2 is 3 x 10-3 at some temperature. The reaction is started by placing a sample of ammonia in an empty one liter flask. When equilibrium is established there is 0.010 mole of N2 present. How much...
Sunday, January 8, 2012 at 7:58am by Anonymous

chemistry
For reactions in solution, molar concentrations are usually used in equilibrium constant expressions (designated by K or Kc). In gases, partial pressures can also be used (designated by Kp). Equilibrium partial pressures of NOCl, NO and Cl2 in a container at 300 K are 1.2 atm...
Wednesday, April 10, 2013 at 9:31am by alex

Chemistry
PCl5 --> PCl3 + Cl2 (Kp = 630 at 546 K) A system is prepared by placing equimolar amounts of the three gases shown in the equation above in a suitable rigid container held at constant volume. Equilibrium is established at 546 K. (A) When equilibrium is established, how ...
Monday, April 25, 2011 at 11:04am by Molly

Chemistry
C(s) + H20(g)↔ CO(s) + H2(s) the equilibrium constant for this reaction is 4.251 x 10^-2 at 800 K. if the equilibrium concentration of H2O(g)is 0.1990 M, what are the concentrations of CO, H2, and C?
Thursday, March 29, 2012 at 12:26am by Someone

Chemistry
H2(g) + I2(g) 2 HI(g) The forward reaction above is exothermic. At equilibrium, what happens if I2 is removed from the reaction mixture at constant temperature and volume? The reaction absorbs energy. The reaction releases energy. [H2] increases. [H2] decreases. [H2] remains ...
Sunday, September 19, 2010 at 9:32pm by Megan

AP Chemistry
A reversible reaction with gaseous reactants and products, such as 2 NO2 <--> N2O4. Although adding or removing products or reactants will "shift the equilibrium", it will not change the equilibrium constant, Keq. More often than not, if a book says ...
Monday, December 28, 2009 at 3:45pm by Priscilla

Chemistry
A mixture containing 0.5 mol of H2 (g) and 0.5 mol of I2 (g) was introduced into a 10L container at a temperature of 448 C. At this temperature the equilibrium constant Kp is 50. i. What is the total pressure in the container before the reaction starts and at equilibrium. ii. ...
Wednesday, December 26, 2012 at 7:25pm by Matt

chemistry
A mixture consisting of 1 mol of H2O (g) and 1 mol CO (g) is placed in a 11 L reaction vessel at 800 K. At equilibrium 0.647 mol CO2 (g) is present as a result of the reaction: CO(g) + H2O (g) --> CO2(g) + H2 What is K(equilibrium constant) at 800 K?
Thursday, January 5, 2012 at 3:54pm by Anonymous

HARD CHEM QUESTION
A chemical system within a sealed 1 L reaction vessel is described by the following reversible reaction equation: 2H2S(g) <-->2H2(g) + S2(g) If the equilibrium constant is 0.000 004 200 at 1103 K find: the reaction quotient initially.
Sunday, April 21, 2013 at 7:35pm by scilover

chemistry
Which of the following can we predict from an equilibrium constant for a reaction? 1 The extent of a reaction 2 Whether the reaction is fast or slow 3 Whether a reaction is exothermic or endothermic a. 1 only b. 2 only c. 3 only d. 1 and 2 only e. 1 and 3 only
Friday, May 14, 2010 at 3:38am by Aungsan

Chemistry
The following reaction has an equilibrium constant of 0.020 at a given temperature. 2HI(g) I2(g) + H2(g) If you have 1.00 mol HI(g) in a 0.750-L container initially, how many moles of HI(g) will be present when the system reaches equilibrium?
Thursday, November 18, 2010 at 5:40pm by Adrianne

chemistry
The equilibrium constant (Kc) for the gas phase reaction 2 NH3 N2 + 3 H2 is 3.0 x 10-3 at some temperature. The reaction is started by placing a 0.040-mol sample of ammonia in an empty one-liter flask. When equilibrium is established how much N2 is present? 1. ) 0.019 mol 2...
Sunday, October 25, 2009 at 5:28pm by James

Chemistry
3H2(g)+N2(g)=2NH3(g) Suppose the equilibrium constant Kp = 0.003337 for the reaction above. If the equilibrium mixture contains partial pressures H2 = 0.400 atm and N2 = 0.350 atm. What is the equilibrium partial pressure of NH3 in atm?
Thursday, September 23, 2010 at 4:09pm by Tiffany

chemistry
Consider the following reaction: 3C(s) + 4H2(g) -> C3H8(g); DH° = –104.7 kJ; DS° = –287.4 J/K at 298 K What is the equilibrium constant at 400.0 K for this reaction?
Monday, May 3, 2010 at 8:49am by Anonymous

managerial economics
Suppose the inverse market demand equation is P = 80 ¡V 4(QA+QB), where QA is the output of firm A and QB is the output of firm B, and both firms have a constant marginal constant of $4. Firm B is the Stackelberg leader in this market. (a)State the reaction function for ...
Sunday, September 7, 2008 at 10:59pm by jenny

Chemistry
1. Consider the following reaction occurring in a closed chemical system. Assume that this reaction is at equilibrium and that in general the reaction to the right is favored. CH3CH2OH + 3O2 2CO2 + 3H2O ∆H = –1,235 kJ/mol • What type of chemical reaction is...
Tuesday, April 24, 2012 at 9:52am by Anonymous

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