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July 29, 2014

Search: delta G naught

Number of results: 1,409

Inorganic chemistry
Consider the half-reactions: Cu^2+(aq) +2e^- ==> Cu(s) E naught = +0.34V Sn^2+(aq) + 2e^- ==> Sn E naught = -0.14V Fe^2+ + 2e^- ==> Fe(s) E naught = -0.44V Al^3+(aq) = 3e^- ==> Al(s) E naught = -1.66V Mg^2+(aq) = 2e^- ==> Mg(s) E naught = -2.37V Which metals or ...
April 11, 2009 by Steve

biochemistry
Calculate the delta G naught prime f (free energy of formation) of the following compounds at 25 degrees celsius. ethyl acetate (ethyl acetate + H2O <=> ethanol + acetate- + H): delta G naught prime =-19.7 kj/mol); the pka of acetic acid is 4.76) Free Energies for: H2O...
September 8, 2013 by meraki

Inorganic chemistry
E naught cell for the following galvanic cell is +0.254V Hg2^2(aq)+2I^-(aq) ==> 2 Hg(l) + I2(s) What is delta G naught for this reaction? Delat G naught = -nFEnaught n = the number of moles of electrons transferred between oxidizing and reducing agents as determine by the ...
April 14, 2009 by Steve

Chemistry
Under the appropriate conditions, NO forms NO2 and N2O: 3NO(g) <--> N2O(g) + NO2(g) Use the values for delta G naught for the following reactions to calculate the value of Kp for the above reaction at 500.0 C 2NO(g) + O2(g) <--> 2NO(g) delta g=-69.7 kJ 2N2O(g) <...
November 5, 2012 by Victoria

Inorganic chemistry
Calculate E naught cell for the reaction b 5Cd(s) + 2MnO4-(aq) + 16H+(aq) ==> 5Cd^2+(aq) = 2Mn^2+(aq) + 8H2O(l) given the following standard reduction potentials MnO4^-(aq) + 8H^+(aq) = 5e^- ==> Mn^2+(aq) + 4 H2O(l) E naught = +1.52V Cd^2+(aq) + 2e^- ==> Cd(s) E ...
April 11, 2009 by Steve

Inorganic chemistry
Calulate E naught cell for the reaction below 5 Cd(s) + 2 MnO4^-(aq) + 16H+(aq)+ 2 Mn2+(aq) + 8 HxsO(l) The oxidation anode must be 5Cd(s) ==> 5Cd2+(aq) +10e^- The reduction cathode must be 2MnO4^- + 16H2^=(aq) + 10e^- ==> 2Mn2+(aq) + 8H2O E naught cell = E naught ...
April 14, 2009 by Steve

chemistry
Under the appropriate conditions, NO forms NO2 and N2O: 3NO(g) <--> N2O(g) + NO2(g) Use the values for delta G naught for the following reactions to calculate the value of Kp for the above reaction at 500.0 C 2NO(g) + O2(g) <--> 2NO(g) delta g=-69.7 kJ 2N2O(g) <...
November 5, 2012 by Victoria

Inorganic chemistry
Given the following two half-reactions, determine which overall reaction is spontaneous and calculate its standard cell potential. Cd^2+(aq) + 2e^- ==> Cd(s) E naught = -1.21V Sn^2+ + 2e^- ==Sn(s) E naught = -0.14V
April 11, 2009 by Steve

Inorganic chemistry
E naught cell for the following galvanic cell is +0.254V. Hg^2+(aq) + 2I^-(aq) ==> 2 Hg(l) +I2(s) What is the change G naught for this reaction?
April 11, 2009 by Steve

Inorganic chemistry
Given the following standard reduction potentials, Fe^2+(aq) = 2e^- ==> Fe(s) E naught = -0.440V FeS(s) + 2e^- ==> Fe(s) + S^2-(aq) E naught = -1.010V determine the Ksp for FeS(s) at 25 degress Celsius
April 11, 2009 by Steve

Chemistry
Please explain. The enthalpy changes for two different hydrogenation reactions of C2H2 are: C2H2+H2---->C2H4 Delta H 1 C2H2+2H2---->C2H6 Delta H 2 Which expression represents the enthalpy change for the reaction below? C2H4+H2---->C2H6 Delta H = ? A. Delta H 1 + ...
November 11, 2013 by Anonymous

CHEMISTRY
Please explain. The enthalpy changes for two different hydrogenation reactions of C2H2 are: C2H2+H2---->C2H4 Delta H 1 C2H2+2H2---->C2H6 Delta H 2 Which expression represents the enthalpy change for the reaction below? C2H4+H2---->C2H6 Delta H = ? A. Delta H 1 + Delta...
November 11, 2013 by Anonymous

Physics
A plane drops a hamper of medical supplies from a height of 5210 m during a practice run over the ocean. The planes horizontal velocity was 133 m/s at the instant the hamper was dropped. The acceleration of gravity is 9.8 m/s^2. What is the magnitude of the overall velocity ...
September 6, 2010 by John

Chemistry(Please check answers)
1) For a reaction delta Go is more negative than delta Ho. What does this mean? a. delta So is zero. b. delta So is negative c. delta So is positive d. delta So is negative if delta Ho is positive. e. delta So is negative if delta Ho is negative. I think that delta S is ...
April 23, 2012 by Hannah

Chemistry
Clapeyron equation: dp/dT = ΔS / ΔV My textbook says, for fusion/melting reactions: dp/dT = ΔH / (T ΔV) this implies that T * ΔS = ΔH. I know T * ΔS = q and at constant pressure, that equals H, but the dp/dT reaction is not at constant...
March 11, 2009 by reed

Calculus-Solved - Incorrect
calculate delta y for f(x)= x^(3/2) with x= 4 and delta x= dx=0.1 delta y= f(x+delta x)- f(x) = f(4.1) - f(4) delta y= f(4.1)-8 f(x + delta x)= 8 + 3/2*x^(1/2)*0.1 = 8 + 0.15x^(1/2) = 8 + 0.30 = 8.30 delta y= 8.30 - 8 delta y= 0.30 but this is wrong. why is it wrong?
May 4, 2013 by Alaina

Chemistry(DrBob222)
So, i did this lab, a solubility and thermodynamics lab of KNO3, and in it we had to determine the delta h delta g and delta s, the question i have is what is the relationship of the signs delta h, delta s, and delta g, to the dissociation of the salt and the temperature ...
December 9, 2013 by K

math
Compute delta(y) and dy for the given values of x and dx=delta(x) y=x^2 , x=8 , delta(x)=0.5 Delta(y)= ??? dy = ??? I got dy=8 by doing: dy= (f prime of x)dx dy=2xdx dy=2xdelta(x) dy=2*8*0.5 dy=8 but I have not clue how to find delta(y) please help! deltay = y(x+deltax)- y(x...
April 14, 2007 by Julia

Chem
For the reaction I2(s)+Cl2(g) ==> 2ICl(g) delta H= 36kJ, delta S= 158.8J/K at 25 C. Calculate the temperature at which Keq is 4.0*10^3. delta G= (delta H)- T(delta S) = 36 - (298)(0.1588) = -11.32 delta G= -RTlnK -11.32= -8.31Tln(4*10^3) -11.32= -6892.35 T T= .00164 > ...
August 10, 2009 by ---

Physics
1. If the change in position delta(x) is related to velocity v (w/ units of m/s) in the equation delta(x)=Av, the constant A has which dimension? a. m/s^2 b. m c. s d. m^2 2. If a is acceleration (m/s^2), delta(v) is change in velocity (m/s), delta(x) is change in position (m...
August 29, 2009 by anonymous

Inorganic chemistry
I'm going to need some help getting this problem started Calculate E for the following electrochemial cell at 25 degrees Celsius Pt(s) ! Sn^2+(aq, 0.50M), Sn^4+(aq, 0.50Mz0 !! I^-(aq, 0.15M) ! AgI(s) !Ag(s) given the following standard reduction potentials AgI(s) + e^- ==> ...
April 14, 2009 by Steve

chemistry
For a particular reaction delta G is more negative than delta H. This means that a. delta S is zero. b. deltaS is negative c. delta S is positive d. delta S is negative if delta H is positive. e. delta S is negative if delta H is negative. i thought it was c?
April 21, 2012 by CHRIS

Inorganic chemistry
Calc1ulate E for the following electrochemical cell at 25 degrees Celsius Pt(s) ! Sn^2+ (aq, 0.50M), S^4+(aq, 0.50M !!I^-(aq, 0.15M) ! AgI(s) ! Ag(s)! given the following standard reduction potentials. AgI(s) = e^- ==> Ag(s) + I^-(aq) E naught = -0.15V Sn^4+(aq) + 2e^- ==&...
April 11, 2009 by Steve

Chemistry
2M +6HCl>2MCl+3H2 Delta H= -638.0 Kj HClg>HCl aq= Delta H -74.8 Kj H2+Cl2>2HCl Delta H -1845.0 Kj MCl3s> MCl3 aq Delta H -249.0 Kj Use the information above to determine the enthalpy of the following reaction. 2M +3Cl2>2MCl3 Delta H =???
March 22, 2013 by Raul

Physics
Sorry, I asked this question earlier but I didn't clarify it well: A plane drops a hamper of medical supplies from a height of 5210 m during a practice run over the ocean. The planes horizontal velocity was 133 m/s at the instant the hamper was dropped. The acceleration of ...
September 6, 2010 by John

Valid statements
Determine which statement follows validly from the statements included. 1) If Delta is an alpha, then Delta is a beta. If Delta is a theta, then Delta is a beta. Either Delta is an alpha or Delta is a theta. Therefore, Delta is ... 2)Either Delta is an alpha or Delta is a beta...
October 12, 2011 by AL 92

CHEMISTRY
I know I posted this question before, but can you clarify it?? MY QUESTION IS AFTER YOU SWITCHED THE DELTA H1 THE CHANGE IN THE ENTHALPY IS NEGATIVE.... BUT THAT DOES NOT MAKE SENSE BECAUSE THE CHANGE IN ENTHALPY OF THE ORIGINAL DELTA H1 IS NEGATIVE(ACCORDING TO THE ...
November 14, 2013 by Anonymous

Chemistry
I know I posted this question before, but can you clarify it?? MY QUESTION IS AFTER YOU SWITCHED THE DELTA H1 THE CHANGE IN THE ENTHALPY IS NEGATIVE.... BUT THAT DOES NOT MAKE SENSE BECAUSE THE CHANGE IN ENTHALPY OF THE ORIGINAL DELTA H1 IS NEGATIVE(ACCORDING TO THE ...
November 14, 2013 by Anonymous

Chem
Does my work here look right? 3. One mole of an ideal gas expands adiabatically into a vacuum. Calculate q, delta-e, w, and delta-H for the process. q= 0 [adiabatic] w= -Pext(V2-V1) w= 0 delta-e = w + q delta-e = 0 + 0 = 0 delta-h= delta-e + P(delta V) delta-h= 0 + 0 = 0 does ...
February 3, 2007 by Jess

chemistry
what is the difference between these two equation: delta G= delta H-T(delta S) and deltaG(knot)=delta H(knot)-T(delta S knot) Which G do i use to tell whether the reaction is spontaneous
October 17, 2010 by nighter

chemistry
what is the difference between these two equation: delta G= delta H-T(delta S) and deltaG(knot)=delta H(knot)-T(delta S knot) Which G do i use to tell whether the reaction is spontaneous
October 17, 2010 by nighter

chemistry
Is delta Tf = delta Tb? The original practice problem is Detla Tf= 8.631 for an aqueous solution, what is delta Tb. I know that Delta Tf=Kf*m
February 28, 2008 by Sarah

Chemistry
Calculate the DELTA H(rxn), DELTA S(rxn), DELTA S(universe), DELTA G(rxn). For each system below indicate whether DELTA S and DELTA H are positive or negative. Then indicate if the reaction is entropy driven, enthalpy driven or neither. C3H8(g) + 2O2(g) => 3CO2(g) + 4H2O(g)
September 19, 2008 by Zach

Chemistry
for the reaction of hydrogen with iodine H2(g) + I2(g) --> 2HI(g) relate the rate of disappearance of hydrogen gas to the rate of formation of hydrogen iodide. and my answer is: rate formation of HI= delta [HI]/delta t and the rate of reaction of I2 = delta [I2]/ delta t to...
February 17, 2008 by Lauren

Chemistry(Please check)
Delta G^o for a reaction can be calculated from? 1. delta G^o f data 2. Delta H^o f and delta S data 3. equilibrium constants I chose that delta G can be calculated from H and S values. Would you agree?
April 22, 2012 by Hannah

Chemistry
How do I find the equilibrium constant for 4NH3(g) + 5O2(g) --> 4NO(g) + 6H2O(g) at 825 degrees celcius, assuming that delta H and delta S knot do not depend on temperature, and Delta H is -908 KJ and Delta S is 1206 KJ?
September 25, 2011 by Summer

Inorganic chemistry
Given the following standard reduction potentials, Fe^2+(aq) + 2e^- ==> Fe(s) E naught = -o.440V FeS(s) + 2e^- ==> Fe(s) + s^2-(aq) E naught = -1.010V determine the Ksp for FeS(s) at 25 degrees Celsius Fe(s) ==> Fe^2+ + 2e^- (oxidation) FeS(s) + 2E^- ==> Fe(s) + S^...
April 14, 2009 by Steve

Chemistry
I am having trouble with this equation and calculating the enthalpy of formation. 2 NaHCO3 (s) --> Na2CO3 (s) + H2O (g) + CO2 (g) delta H129.2kj I get as far as this step and then I dont know what to do next. delta H= [1*delta H (Na2CO3) + 1* delta H(H2O (g)) + 1* delta H(...
April 30, 2013 by Laura

Chemistry
The following standard free energies are given for 25 degrees celcius. 1) N2(g) + 3H2(g)-> 2NH3(g) delta g = -33.0 kJ 2) 4NH3(g) + 5O2(g)-> 4NO(g) + 6H20() delta g = -1010.5 kJ 3) N2(g) + o2(g)-> 2NO(g) delta g = 173.1kJ 4) N2(g) + 2O2(g) -> 2NO2(g) delta g = 102.6...
July 6, 2011 by K

Chemistry
For the reaction described by the chemical equation: 3C2H2(g) -> C6H6(l) .. Delta H rxn = -633.1 kJ/mol a) Calculate the value of Delta S rxn at 25.0 C... b) Calculate Delta G rxn... c) In which direction is the reaction, as written, spontaneous at 25 C and 1 bar pressure...
March 9, 2012 by Katherine

Chem 2
for the evaporation of water during perspiration on a hot dry day 1.delta H is greater than zero and Tdelta S is equal to Delta H 2.delta H is greater than zero and Tdelta S is gretaer than Delta H 3.delta H is greater than zero and Tdelta S is less than Delta H 4.delta H is ...
April 29, 2007 by ok

Chemistry
delta T = ikfm delta T is the amount f.p. is lowered. i is the number of particles; i.e., Na3PO4 will have i = 4 (3 for Na and 1 for PO4). m is molality. k is a constant and need not enter into the calculations. Arrange the following solutions in order of decreasing freezing ...
January 21, 2007 by DrBob222

Chemistry
Is the following reaction spontaneous at 25*C? delta s reaction = -217 J/K*mol delta H rxn = -1202 KJ 2Mg (s) + O2 (g) -> 2MgO (s) delta suniverse = delta s system - delta H system / T i got positive (+) 3.81 x 10 ^ 3 J/K and my notes says it is spontaneous but i feel like ...
June 8, 2011 by ChemLover

CHEMISTRY
calculate the delta h for the reaction 2C+2H--> C2H4 C+O2--> Co2 delta h= -393.5 C2H4+ 3O2--> 2CO2+ 2H2O delta h= 1410.9 H2+ 1/2 O2--> H2O delta h= -285.8 2CO+ O2--> 2CO2 delta h= -566.0 do you flip the first two equations and times the first and third one by 2?
June 6, 2010 by Anonymous

chemistry
use the following data, as appropriate, to estimate the molarity of a saturated aqueous solution of Sr(IO3)2. Molarity of a saturated aqueous solution of Sr(IO3)2 Sr(IO3)2(s) delt h kJ/mol=-1019.2 delta G kJ/mol=-855.1 delta S= 234 J mol-1K-1 Sr^2+(aq) delta h= -545.8 kJ/mol ...
December 2, 2012 by Allyx3

chemistry
use the following data, as appropriate, to estimate the molarity of a saturated aqueous solution of Sr(IO3)2. Molarity of a saturated aqueous solution of Sr(IO3)2 Sr(IO3)2(s) delt h kJ/mol=-1019.2 delta G kJ/mol=-855.1 delta S= 234 J mol-1K-1 Sr^2+(aq) delta h= -545.8 kJ/mol ...
December 2, 2012 by Allyx3

CALCULUS help please
Find the following limit where f(x) = 4x^2 − 3x. limit-->(f(x+ delta x)-f(x))/(delta x) delta x **delta x means the triangle symbol with x next to it***
September 26, 2011 by kunti

equibrium - help!
Consider the reaction CO(g) + H2O(g) <--> CO2(g) + H2(g) Use the appropriate tables to calculate a) delta-G*f at 552*C b) K at 552*C I'm pretty sure I have a good idea of how to do this: I believe I can use Gibbs-Helmholtz equation to account for the temperatures... ...
April 15, 2007 by Daniel

calculus
correct me if I'm wrong please. 1. What is the value of Lim 2x+3/4x-5 when x>00 (infinity?) a.-3/5 b.0 c.1/2 <.. my answer d.1 2. An object moves according to the law s = t^2 + 5t - 8. What is the average rate of change of s with respect to t in the interval t to (t + ...
February 6, 2011 by Anonymous

Chemistry(Please help)
delta Go = -431.16kJ/mol - (298k X 0.12529 kJ/K*mol) I am having trouble converting the units for delta H and delta s to match. I multiplied delta H by 1000 to get kJ but this didnt give me the correct answer.
April 25, 2012 by Hannah

chemistry
consider the following reaction at 298K 4Al(s)+3O2(g) yields 2Al2O3(s) delta H= -3351.4 Kj find delta S sys find delta S surr find delta S unvi
November 20, 2013 by Jessica

Physics
A particle moves in the xy plane with constant acceleration. At time zero, the particle is at x = 4.5 m, y = 6.5 m, and has velocity v(naught) = (6.5 m/s)i-hat + (−2.5 m/s)j-hat (arrow for v(naught) points toward positive x direction). The acceleration is given by a = (6...
September 6, 2010 by John

Chemistry
2CH3CH2CH2OH(l)+9O2(g)→6CO2(g)+8H2O(g) I have to find the delta G delta G of CH3CH2CH2OH(l)=−360.5 KJ/Mol delta G of O2(g)=0 KJ/Mol delta G of CO2(g)=−394.4 KJ/Mol delta G of H20(g)=−228.6 KJ/Mol I keep getting -3426.2 KJ/Mol but its not correct.
June 21, 2013 by dave

chem!
Calculate the heat of reaction for the incomplete combustion of 67.0g propane producing carbon monoxide gas and water vapour. how would I go about and do this question? What are you studying? Do you know how to use the thermodynamic tables (delta Ho, etc). delta Hrxn = delta ...
May 14, 2007 by Chem

chem
calculate the delta Hf of c6h12o6 (s) from the following data: Delta H combustion= -2816 kj/mol delta Hf of Co2 = -393.5 kj/mol delta Hf= of H2 O= -285.9kj/mol
March 4, 2012 by Cece

Chemistry II
Saw this one already answered, but did not understand at all... Calculate the delta Hf of C6H12O6 (s) from the following data: Delta H combustion= -2816 kj/mol delta Hf of Co2 = -393.5 kj/mol delta Hf= of H2 O= -285.9kj/mol
March 3, 2013 by Scooby

Chemistry
Given the Data: N2(g) + O2g) = 2NO(g) delta H = 180.7kj, 2NO(g) + O2(g) = 2NO2(g) delta H = 0113.1kj, 2N2O(g) = 1N2(g) + O2(g) delta H = -163.2kj. Using Hesss Law calculate delta H for the reaction: N2O(g) + NO2(g) = 3NO(g)
July 3, 2014 by Brett

Chemistry
Given the Data: N2(g) + O2g) = 2NO(g) delta H = 180.7kj, 2NO(g) + O2(g) = 2NO2(g) delta H = 0113.1kj, 2N2O(g) = 1N2(g) + O2(g) delta H = -163.2kj. Using Hesss Law calculate delta H for the reaction: N2O(g) + NO2(g) = 3NO(g)
July 3, 2014 by Dan

chemistry
divide eq 2 by 2: 2H(g)........> H2(g) delta H= -104.2Kcal H(g) ........> 1/2 H2(g) delta H= -72.1Kcal Now reverse the reaction: 1/2H2(g).......>H(g) delta H=+72.1Kcal subtract this eq from eq 1 1/2H(g)+1/2I2(g).....>HI(g) delta H=-1.1kcal +-1/2H2(g)......>+-H(g...
November 28, 2010 by Anonymous

Chemistry
Which of the following reactions are spontaneous (favorable)? A] 2Mg(s) + O2(g) -> 2MgO(s) Delta G = -1137 kJ/mol .. B] NH3(g) + HCl(g) -> NH4Cl(s) Delta G = -91.1 kJ/mol ... C] AgCl(s) -> Ag+(aq) + Cl-(aq) Delta G = 55.6 kJ/mol .. D] 2H2(g) + O2(g) -> 2H2O(g) ...
March 8, 2012 by Kat

Chemistry
The molar solubility of lead iodide is 1.45*10^-3M at 20 degrees C and 6.5*10^-3M at 80 degrees C . What are the values of delta H not and delta S not for dissolution of PbI2 ? PbI2(s) ---> Pb2+(aq) + 2I- (aq) You may assume that delta H and delta S are independent of ...
November 20, 2010 by Tal

Physics
A particle moves in the xy plane with constant acceleration. At time zero, the particle is at x = 4.5 m, y = 6.5 m, and has velocity v(naught) = (6.5 m/s)i-hat + (−2.5 m/s)j-hat (arrow for v(naught) points toward positive x direction). The acceleration is given by a = (6...
September 6, 2010 by John

Chemistry
HELP! :) Consider the following reaction: 3A to 2B The average rate of appearance of B is given by deltaB divided by delta t. Comparing the rate of appearance of B and the rate of disappearance of A, we get Delta B divided by Delta t= ___* (-delta A divided by delta t) Thanks!
May 24, 2012 by Mel

Physics
(delta)Eg = -14.7J Therefore, Ek = -(delta)Eg = 14.7J I don't understand how you'd come to the above conclusion? Does Ek just always equal -(delta)Eg?
June 21, 2013 by a Canadian

Chem
I need to figure out Delta H, Delta S, and Delta G for the following problem. H2+F2 Yeilds 2HF the temperature is at 298K
June 18, 2011 by Stacy

calculus
limit as delta x approaches 0 when f(x) = 4/ sqr x Have to use the (F(x+delta x)-f(x))/delta x method
August 31, 2012 by kale

Chemistry
Estimate the temperature where Delta G = 0 for the following reaction (Given: Delta H=-176 and Delta S = -284.5 J/K NH3 + HCl --> NH4Cl
May 1, 2013 by ramire2

Calculus-Solved-Why is this wrong?
use differentials to approximate the change in f(x) if x changes from 3 to 3.01 and f(x) = (3x^2-26)^10 derivative: 10(3x^2-26)^9 f(x+ delta x)= 1 + 10(3x^2-26)^9 * 0.01 = 1 + 10(0.01) <-- Substitute 3 for x = 1 + 0.1 = 1.1 delta y= 1.1 - 1 delta y= 0.1 but 0.1 is incorrect...
May 4, 2013 by Alaina

Chemistry
1)Which thermochemical equation and data does not agree with the other two written? a) 2NO (g)+ O2 (g) ->2 NO2 (g) deltaH=-169.8 b) NO (g) + 1/2 O2 (g) -> NO2 (g) delta H = -56.6 c) 4 NO2 (g) -> 4 NO (g) + 2 O2 (g) delta H = +226.4 d)all three equations are in ...
January 22, 2012 by Rick

Chemistry
BrO-3 + 5Br- + 6H+ ---> 3Br2 + 3H2O the value of - delta[BrO3]/delta T= 1.5x10^-2M/s at a particular time what is the value of -delta [Br-]/Delta t at the same instant? 13 M/s 7.5x10^-2 1.5x10^-2 3.0x10^-2 330 M/s
February 25, 2008 by drew

calculus
Find f(x+ (delta)x)- f(x) --------------------- (delta)x if f(x)=8x(squared)+ 1 This is so confusing! What is all the delta x stuff?
September 18, 2008 by Kim

Chemistry
To obtain the rate of the reaction 3I-(aq) + H3AsO4(aq) + 2H+(aq) --> I3-(aq) + H3AsO3(aq) + H2O (l) I got that the rate is 1/3 delta [I-]/ delta t = delta [H3AsO4]/ delta t is this correct
February 17, 2008 by Lauren

Chemistry
To obtain the rate of the reaction 3I-(aq) + H3AsO4(aq) + 2H+(aq) --> I3-(aq) + H3AsO3(aq) + H2O (l) I got that the rate is 1/3 delta [I-]/ delta t = delta [H3AsO4]/ delta t is this correct
February 17, 2008 by Lauren

Chemistry
To obtain the rate of the reaction 3I-(aq) + H3AsO4(aq) + 2H+(aq) --> I3-(aq) + H3AsO3(aq) + H2O (l) I got that the rate is 1/3 delta [I-]/ delta t = delta [H3AsO4]/ delta t is this correct
February 18, 2008 by Lauren

Chemistry
To obtain the rate of the reaction 3I-(aq) + H3AsO4(aq) + 2H+(aq) --> I3-(aq) + H3AsO3(aq) + H2O (l) I got that the rate is 1/3 delta [I-]/ delta t = delta [H3AsO4]/ delta t is this correct
February 18, 2008 by Lauren

Chemistry
Calculate the enthalpy of the reaction 2B2H6 + 6O2=2B2O3 +6H2O given the following pertinent information: A. B2O3(s) + 2H2) )g) = 3O2 (g) + B2H6 (g), delta H= +2035kJ B. 2B (s) + 3H2 (g) =B2H6 (g), delta H= +36 kJ C. H2 (g) + 1/2)2 (g) =H2O (l), delta H=-285 D. H2O (l) = H2O (...
April 22, 2012 by B

chemistry 101
Calculate (delta) H rxn for 2NOCl(g)---- N2(g) + O2(g) + Cl(g) given the following set of reactions: 1/2N2(g) + 1/2O2(g)-----NO(g) delta H =90.3kJ NO(g) + 1/2Cl2(g)----NOCl(g) delta H = -38.6 kJ
October 27, 2009 by Kaylyn

Chemistry for Eng.
Select the delta H values associated with the dissolution of lithium chloride that are exothermic. delta H1: energy associated with the separation of water molecules delta H2: energy associated with the separation of ions delta H3: energy associated with the formation of water...
November 1, 2012 by Anonymous

Chemistry(Please help)
1) Nitrosyl chloride (NOCl) decomposes at high temperature. The equation is 2 NOCl (g) -> 2 NO (g) + Cl2 (g) at 227oC Using delta Ho = 81.2 kJ and delta So = 128 J/K, calculate the value of the equilibrium constant for this reaction. I do not know how to start this problem...
April 24, 2012 by Hannah

Chemistry
Given the thermodynamic data in the table below, calculate the equilibrium constant for the reaction: 2SO2(g)+O2--> 2SO3 Substance (DeltaH^o) (Delat S^o) SO2 -297 249 O2 0 205 SO3 -395 256 Answer (it was given) 2.32x10^24 Even though the answer is given (2.32x10^24) I just ...
March 16, 2008 by Sara

Chemistry
Given the thermodynamic data in the table below, calculate the equilibrium constant for the reaction: 2SO2(g)+O2--> 2SO3 Substance (DeltaH^o) (Delat S^o) SO2 -297 249 O2 0 205 SO3 -395 256 Answer (it was given) 2.32x10^24 Even though the answer is given (2.32x10^24) I just ...
March 16, 2008 by Sara

chemistry
consider the following changes at constant temperature & pressure H2O(s) --yields-- H20(l); Delta H1 H2O(l) --yields-- H2O(g); Delta H2 H2O(g) --yields-- H2O(s); Delta H3 Using Hess's law, the sum of the deltas is a. equal to 0 b. sometimes greater than zero, sometimes less ...
November 14, 2012 by marcus

chmistry
3O2(g)---> 2O3(g) Delta H = +284.6 kJ what is the sign of delta G and delta S
February 5, 2013 by bb

Chemistry
I need to calculate the value of Kp at 25 degrees celsius using the delta Go value. Delta Go = -29.10kJ I know that Delta Go = -RT lnK and that R=8.314e-3kJ/K mol -delta Go / RT I did -29.10 / 8.314e-3 X 298K and -11.74 but this was wrong. I am stuck. What did I do wrong?
April 23, 2012 by Hannah

Chemistry
Mg + 2HCl -> MgCl2 +H2 delta H = ? MgO + 2HCl (aq) -> MgCl2+ H2O delta H = ? H2+ 1/2O2 -> H2O delta H = -285.8 kJ Using Hess' Law find both the missing delta H values.
March 28, 2012 by Hunter

physics help!!!
the volume occupied by 1kg of water at 100C and atmospheric pressure changes from 1L in the liquid phase to 1700L in the vapor phase. evaluate the difference in internal energy of 1kg of water vapor and 1kg of liquid water at the normal boiling point: So i have the equation is...
June 24, 2009 by sarah

Chemistry
Calculate the delta H and delta S for the reaction. From there, calculate the delta G at 25 degrees Celsius. Predict whether it the reaction is spontaneous or non-spontaneous under standard conditions. CH3OH(l)+ O2(g)--> HCO2H(l)+ H2O(l) *i could not find the find the delta...
February 26, 2010 by Anonymous

Mike
N2 + 3H2 --> 2NH3 At 25°C (delta)Ho = -92.22 kJ and (delta)So = -198.53 J/K. Using this information, calculate the equilibrium constant for the reaction at 2.43x10^2°C. (R = 8.314 J/K) Apparently the way I'm doing it is wrong: I divide 198.53 by 1000 then multiply by 298 ...
November 17, 2007 by Chemistry

Dan
N2 + 3H2 --> 2NH3 At 25°C (delta)Ho = -92.22 kJ and (delta)So = -198.53 J/K. Using this information, calculate the equilibrium constant for the reaction at 2.43x10^2°C. (R = 8.314 J/K) Apparently the way I'm doing it is wrong: I divide 198.53 by 1000 then multiply by 298 ...
November 17, 2007 by Chem

Chemistry
For a particular reaction at 195.1 C, ΔG = -1488.09 kJ/mol, and ΔS = 288.67 J/(molK).? Calculate ΔG for this reaction at -20.0 C. delta G = delta H - (T*delta S) -1488.09 kJ/mol = (delta H) - ((461.8K)*(+288.67 J/(mol x K))*(1 kJ/1000 J)) -1488.09 kJ/mol = (...
April 30, 2013 by Dee

Physics HELP!!!!!!!!
Suppose a monatomic ideal gas is contained within a vertical cylinder that is fitted with a movable piston. The piston is frictionless and has a negligible mass. The area of the piston is 3.06 10-2 m2, and the pressure outside the cylinder is 1.02 105 Pa. Heat (2109 J) is ...
April 21, 2007 by Mary

Teddy
f(x,y) = 3x + 3y Show that for any epsilon in: |2x + 3y - 5| < epsilon There is a delta value: sqrt((x - 1)^2 + (y - 1)^2) < delta Solve for delta in terms of epsilon ------ I understand that this is a proof that the limit of f(x,y) as (x,y) -> (1,1) is 5. But I'm ...
January 24, 2013 by calculus

science
if it takes 31,500 joules of heat to warm 750g of water, what was the temperature change? My answer: Q = (M) (DeltaT) (c) Delta T=Q Delta T = 31,500J -------- 750gx 1.0cal/gCo Delta T = 42oC
April 26, 2008 by sam

Chem
CH4(g)+2O2 arrow CO2(g)+2H2O(1) delta H=-890.3kJ. Calculate delta Hwhen 5 grams of methane react with an excess of oxgen?o i just divide Delta H by 5?
February 24, 2013 by Anonymous

chemistry
Given: *Fe2O3(s)+3CO(s)-->2Fe(s)+3CO2(g)(delta h is -23kJ) *3Fe2O3(s)+CO(g)-->2Fe3O4(s)+CO2(g)(delta h is -39kJ) *Fe3O4(s)+CO(g)-->3FeO(s)+CO2 (delta h is 18kJ) Desired:FeO(s)+CO(g)-->Fe(s)+CO2(g) find delta h for the desired reaction. which reactions do i reverse ...
March 26, 2008 by tanisha

science dr bob
if it takes 31,500 joules of heat to warm 750g of water, what was the temperature change? My answer: Q = (M) (DeltaT) (c) Delta T=Q Delta T = 31,500J -------- 750gx 1.0cal/gCo Delta T = 42oC
April 25, 2008 by sam

Chemistry
A sample of 2.00 mol O2 (assumed perfect) is originally confined in a 20.0L at 273K and 2.24 atm. it undergoes reversable adiabatic expansion until the volume has increased by a factor of 3. Calculate q, w, delta u, delta h, and delta t. Cv=7/2R and cp=5/2R
September 6, 2012 by Erica

Physics
What property of Maxwells equations results in electromagnetic waves? A. Moving charges create B B. There are no magnetic monopoles C. delta E/Delta t creates B and delta B/delta T creates E D. Charges create E and currents create B
October 30, 2010 by Jessica

Chemistry
How would you calculate delta H for the following reaction: 2P + 5Cl2 -> 2PCl5 Given: PCl3 + Cl2 -> PCl5 Delta H=-87.9 kJ 2P + 3Cl2 -> 2PCl3 Delta H=-574 kJ I have no clue how to do this since I was absent. Can someone help?
March 3, 2009 by Samantha

fin corp
Delta has achieved an average return on equity of 36.5% for the last five years. If Delta generates a 17.2% net profit margin on sales of $3 billion and pays no dividends, what is Deltas sustainable growth rate?
May 26, 2009 by Anonymous

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