Search: combustion

Number of results: 996

Chem
The entropy of combustion of benzoic acid is zero. This means that... a)combustion is not spontaneous here. b)combustion is spontaneous, however, since the reaction is exothermic. c)combustion is spontaneous, however, since the reaction is endothermic. d)combustion is ...
Monday, March 31, 2008 at 7:45pm by Ginger

Chemistry
Write equations for the following reactions: the combustion of propane the incomplete combustion of propane to for CO and water the complete combustion of 8,8-dimethylpropane in oxygen
Sunday, December 5, 2010 at 12:26pm by Amanda

chemistry
The peanut studied had a mass of 0.609 g before combustion and 0.053 g after combustion. The energy released during combustion caused a 14.2 degree Celsius increase in the temperature of 200.0 mL water in the calorimeter. Calculate the mass of peanut burned.
Thursday, August 30, 2012 at 12:20am by Lauren

chemistry
Write an equation for the combustion of one mole of benzene, C6H6(l), and use data from Appendix D to determine delta G degrees (which is 124.5) at 298K if the products of the combustion are (a) CO2(g) and H2O(l), and (b)CO2(g) and H2O(g). Describe how you might determine the ...
Wednesday, July 14, 2010 at 6:44pm by Ashely

Chemistry
This would be an enthalpy of combustion, not formation. The heat of combustion for decane is 6777.45kJ/mol.
Friday, December 14, 2012 at 8:34am by Dayton

CHEMISTRY
A 8.90-g sample of ethane, C2H6, is mixed with 18.8 atm of O2 (an excess) in a 1.50 L combustion chamber at 130.0°C. The combustion reaction to CO2 and H2O is initiated and the vessel is cooled back to 130.0°C. What is the final pressure in the combustion chamber ...
Thursday, January 17, 2008 at 8:04pm by Matt

Molar heat of combustion question!
Calculate the molar heat of combustion of paraffin, expressed in units of kJ/mol. First calculate the thermal energy released when one mole of parafin burns) because one mole of parafin (c25h52) has a mass of 325g, the molar heat of combustion will be 352 times greater than ...
Tuesday, February 5, 2013 at 4:55pm by Allyson

ap
Identify the type of reaction C4H10(g) + O2(g) ! CO2(g) + H2O(g) 1. hydrocarbon synthesis 2. single displacement 3. incomplete combustion 4. complete combustion
Monday, October 1, 2012 at 8:28pm by cheri

Chemistry Octane Combustion
Write the balanced equation for the combustion of octane (C8H18). Assuming that gasoline is 100% octane, with a density of 0.692 g/mL, what mass of CO2 is produced by combustion of 1.7 1010 gal of gasoline? Need help on how to get started, I have the balanced equation...
Tuesday, September 15, 2009 at 6:45pm by Chemistry

Chemistry
Note the correct spelling of celsius. q = mass H2O x specific heat H2O x (Tfinal-Tinitial) q = heat combustion heat combustion/g = q/1.32g\ heat combustion/mol = (q/1.32)*molar mass. This will be in J/mol. Convert to kJ/mol.
Thursday, February 7, 2013 at 1:10pm by DrBob222

Chemistry
The heat of combustion of 2-propanol at 298.15 , determined in a bomb calorimeter, is -33.41. (a) For the combustion of one mole of 2-propanol, determine delta U (b) For the combustion of one mole of 2-propanol, determine delta H
Monday, November 19, 2012 at 4:34pm by Chironjit

Chemistry
The combustion of benzoic acid releases 26.38kJ/g and is often used to calibrate a bomb calorimeter. the combustion of 1.045 g of benzoic acid caused the temperature of the calorimeter to rise by 5.985C. Useing the same calorimeter, a sample of 0.876g of octane (C8H18) was ...
Thursday, October 4, 2012 at 3:23pm by Alisha

Chemistry
The enthalpy of combustion of benzoic acid is –26.4 kJ/g. What is the enthalpy of combustion expressed in joules per kilogram?
Wednesday, January 18, 2012 at 2:24pm by Cynthia

chemistry - combustion
Write the chemical equation for the complete combustion of each fuel. Then find the enthalpy of combustion, ΔHcomb, of each fuel. Express your answers in kJ/mol and kJ/g. Assume that water vapour, rather than liquid water, is formed in both reactions. CH4 + 2O2 &#...
Friday, April 1, 2011 at 9:16am by Farah

chem
The heat of combustion of 2-propanol at 298.15 {\rm K}, determined in a bomb calorimeter, is -33.41{\rm{kJ/g}}. (a)For the combustion of one mole of 2-propanol, determine \Delta U. (b)For the combustion of one mole of 2-propanol, determine\Delta H.
Monday, November 19, 2012 at 1:00pm by Chironjit

physical chemistry
A sample of the sugar D-ribose (C5H10O5) of mass 0.727g was placed in a constant volume calorimeter and then ignited in the prescence of excess oxygen. The temperature rose by 0.910K In a separate experiment in the same calorimeter, the combustion of 0.825g of benzoic acid for...
Thursday, February 23, 2012 at 11:46pm by nicole

Chemistry
The combustion of how many moles of ethane would be required to heat 838 grams of water from 25.0 to 93.0 degrees C? Assume liquid water is formed during the combustion.
Friday, November 2, 2012 at 6:42pm by k

chemistry
The change in internal energy for the combustion of 1.0 mol of octane at a pressure of 1.0 atm is 5084.3kJ. if the change is enthalpy is 5074.1kJ, how much work is done during the combustion?
Sunday, February 20, 2011 at 8:18pm by Anonymous

Chemistry
Write the word and chemical equation for the following: Hexane undegoes complete combustion. I'm not sure at all how to do this one. I know that for compelte combustion, the products have to be H2O + O, but I don't know the formula for Hexane.
Sunday, May 3, 2009 at 8:41pm by Sofia

Chemistry
6. Heat of combustion is the heat released by the complete combustion of one mole of a substance.- T? 8. In nature, processes tend to occur that lead to a higher energy state.- F 9. Concentration does not have an effect on a reaction.- F Thanks! -MC
Friday, October 29, 2010 at 1:22pm by mysterychicken

Chemistry - enthalpy of combustion(help!!!)
i need help with the below question, i have tried answering it, but do not know where to go after the equations, please start me off on how to find the enthalpy of combustion of at least one.... Consider methane, CH4, and hydrogen, H2, as possible fuel sources. (a) Write the ...
Wednesday, June 8, 2011 at 10:12am by Farah

gcse science
i need to find 3 examples of using combustion in everyday life and then i need combustion example , fuel used , and is fuel a fraction of crude oil? thankyou for your help:-}
Saturday, October 9, 2010 at 9:11am by ++ LOUISA MAE++

Chemistry+balancing equation tips
Today, we balanced combustion reactions and I got numbers up to 62! Big numbers are intimidating to me :P. is it always going to be like that for combustion reactions?
Thursday, February 19, 2009 at 5:48pm by Chopsticks

Biophysical Chemistry
The combustion of 1 mole of C2H5OH (Ethanol) in a bomb calorimeter produces 1364 kJ/mol at 25 degree Calcium. What is the value of enthalpy chamge for the following combustion reaction? C2H5OH(l) + 3O2(g) => 2CO2(g) + 3H2O(l)
Tuesday, December 21, 2010 at 8:33pm by Laura

life orientation
Combustion of coal The combustion of coal without special precautions can have serious consequences. If winds do not blow away the poisonous gases,they can have fatal effects and may lead to death.
Thursday, April 11, 2013 at 3:30am by Zinhle mkwanazi

chem
The complete combustion of butane, (g) is represented by the equation C4H10+ 13/2O2->4CO2+5H2O standard enthalpy is -2877kj How much heat, in kilojoules, is evolved in the complete combustion of 12.8ml at 23.8degrees celsius and 744mmhg ?
Wednesday, October 8, 2008 at 5:06pm by tomi

chemistry
What mass of CO2, a greenhouse gas, is produced per liter of each fuel (assuming complete combustion) I got this data density of ethanol = 0.785 g/mL density of octane = 0.699 g/mL Ethanol) C2 H5 OH + 2O2 -> 2CO2 + 3H2O delta H combustion ethanol = -1234.8 Kj/mol Octane...
Thursday, October 13, 2011 at 4:15pm by sari

Chemistry
The combustion of 0.1583 g benzoic acid increases the temperature of a bomb calorimeter by 2.93°C. Calculate the heat capacity of this calorimeter. (The energy released by combustion of benzoic acid is 26.42 kJ/g.) A 0.1710 g sample of vanillin (C8H8O3) is then burned in ...
Sunday, November 13, 2011 at 4:06pm by Bill

chem
The complete combustion of 1.283g of cinnamaldeyde (C9H8O, one of the compounds in cinnamon) in a bomb calorimeter (Ccalorimeter=3.841 kJ/C) produced an increase in temperature of 130.32 C. Calculate the molar enthalpy of combustion of cinnamaldehydy (delta H comb) (in ...
Monday, October 15, 2012 at 3:10pm by greg

Chemistry
The complete combustion of 1.283g of cinnamaldeyde (C9H8O, one of the compounds in cinnamon) in a bomb calorimeter (Ccalorimeter=3.841 kJ/C) produced an increase in temperature of 130.32 C. Calculate the molar enthalpy of combustion of cinnamaldehydy (delta H comb) (in ...
Monday, October 15, 2012 at 1:51pm by Amanda

chemistry
Do any of you think that spontaneous combustion is possible? If a reaction brings about an increase of entropy (increase in randomness) and also exodermic, then a reaction is spontaneous. Right? Yes, I think spontaneous combustion is possible. It happens. Yes, if delta H is ...
Monday, April 16, 2007 at 9:39am by key

Chemistry
It's difficult to know how to answer a question that is so broad. Tackle for what? What do you want to accomplish? Here is the CO equation under incomplete combustion. 2C5H12 + 11 O2 ==> 10CO + 12H2O Under complete combustion: C5H12 + 8O2 ==> 5CO2 + 6H2O
Wednesday, October 7, 2009 at 7:02pm by DrBob222

Chemistry
Hydrogen and methanol (CH3OH) have both been proposed as alternatives to hydrocarbon fuels. a) Write balanced chemical equations for the complete combustion of hydrogen and the complete combustion of gaseous methanol. Combustion reaction for hydrogen: 2H2(g)+ O2 --> ...
Thursday, November 4, 2010 at 1:30am by Jarrod

Chemistry
During the combustion of 5.00 g of octane, C8H18, 239.5 kcal is released. a) What is the sign of (delta)H for this reaction? b) How much energy is released by the combustion of 1.00 mol of C8H18
Monday, November 15, 2010 at 6:09pm by Patrick

Chemistry(HELP)
Can you check this answer? 1. Heat of combustion is the heat released by the complete combustion of one mole of a substance. a.) True b.) False Answer: b.) False Is this right?
Tuesday, April 5, 2011 at 11:42am by Cheryl

chemistry
The combustion of propane IS an exothermic reaction. The heat produced by it heats the water and it heats the calorimeter; therefore, both of the heats absorbed (one by the water and the other by the calorimeter) must be added. The total heat absorbed by the two equals the ...
Wednesday, July 16, 2008 at 8:25pm by DrBob222

Chemistry - Combustion
The standard enthalpies of formation of gaseous propylene (C3H6) and propane (C3H8) are +20.4kJ/mol and -103.8 kJ/mol. Their respective combustion reactions may be written as follows, where one mole of either gas is consumed by oxyen to yield carbon dioxide and water. ...
Tuesday, April 14, 2009 at 12:53am by Brigette

12 Chemistry
If you can do enthalpy change for the experiment (the combustion), that will be for so many grams of Mg, then multiply by molar mass Mg to get molar enthalpy of combustion.
Saturday, March 29, 2008 at 10:58am by DrBob222

Chemistry
Consider the combustion of propane: C3H8(g)+5O2(g) yields 3CO2(g) + 4H2O(l) delta H= -2221 kJ Assume that all of the heat comes from the combustion of propane. Calculate delta H in which 5.00g of propane is burned in excess oxygen at constant pressure.
Sunday, November 13, 2011 at 7:54pm by Shellby

Science
Consider the combustion of propane: C3H8(g)+5O2(g) yields 3CO2(g) + 4H2O(l) delta H= -2221 kJ Assume that all of the heat comes from the combustion of propane. Calculate delta H in which 5.00g of propane is burned in excess oxygen at constant pressure.
Sunday, November 13, 2011 at 7:52pm by Shellby

chem
The complete combustion of butane, (g) is represented by the equation C4H10+13/2O2->4CO2+5H20 STANDARD ENTHALPY IS -2877KJ/MOL How much heat, in kilojoules, is evolved in the complete combustion of 12.8L C4H10 at 23.8degrees celsius and 744mmhg ?
Wednesday, October 8, 2008 at 5:15pm by tomi

chemistry
excatly, im just as confused. I tried to email him, no reply. The problem says what is the ratio of energy yield on combustion of hydrogen atoms to steam to the yield on combustion of an equal mass of hydrogen molecules to steam given. what am i missing
Sunday, March 4, 2012 at 9:23pm by Court

chemistry
The combustion of 0.1619 g benzoic acid increases the temperature of a bomb calorimeter by 2.77°C. Calculate the heat capacity of this calorimeter. (The energy released by combustion of benzoic acid is 26.42 kJ/g.) kJ/°C A 0.1510 g sample of vanillin (C8H8O3) is then ...
Sunday, November 13, 2011 at 2:21pm by william

chemistry
A 1.55 gram sample of methanol (CH3OH) is combusted in a bomb calorimeter. The molar heat of combustion of methanol is -725KJ/mole, assuming that 2.0L of water initially at 25.0 C absorbs all of the heat of combustion, what is the final temperature of the water?
Sunday, June 10, 2012 at 7:30pm by john

chem 101
a.write a balanced chemical equation for the complete combustion of sucrose. --- this part of the question i got help on, and thank you b. if combustion is complete, a brown liquid caramel might form, followed by a brown/black solid. what would be the major component of the ...
Wednesday, September 29, 2010 at 1:12pm by emily

Chemistry
Butane, C4H10, is a component of natural gas that is used as fuel for cigarette lighters. The balanced equation of the complete combustion of butane is 2C4H10(g) + 13O2(g)-> 8CO2(g)+ 10H2O(l) At 1.00 atm and 23 degrees Celcius, what is the volume of carbon dioxide ...
Thursday, October 25, 2012 at 4:54pm by Amy

Chemistry
equilibrium expression for the combustion of octane? My project is due today =/ (it's 1:30 now, and I really need someone to clarify this last one question. Thanks! This is what I got for the combustion of octane. ^denotes a superscript/exponent. [H2O]^18[CO2]^16...
Friday, June 4, 2010 at 1:42am by Jennifer

AP Chemistry
how much heat is produced when the body metabolizes a gram of trioleylglycerol? I know that the combustion of triolelglycerol is exothermic with an enthalphy change of 9 calories per gram of trioleylglycerol molecules, so the combustion will release heat to the surroundings. I...
Monday, January 21, 2013 at 12:11pm by Timofey

chem
consider a mixture of air and gasoline vapor in a piston. original V is 30cm^3. if the combustion of misture releases 985J energy, to what volume will the gases expand against a constant pressure of 655 torr if all energy of combustion is converted into work ro push back the ...
Tuesday, November 20, 2007 at 5:13pm by mel

chemistry
An unknown organic compound that contains carbon,hydrogen and oxygen undergoes a combustion analysis. What happen to the carbon atoms and hydrogen atoms in the compound,assuming that the combustion goes to completion?
Tuesday, October 18, 2011 at 8:53am by Anonymous

physics(heat)
A geyser heats water flowing at the rate of 3L/min from 27 deg C to 77 deg C. if the geyser operates on a burner, what is the rate of combustion of the fuel if its heat of combustion is 40000J/g?
Tuesday, May 29, 2012 at 3:16am by ridhi

chem
consider the following thermochemical equation for the combustion of acetone C3H6O(l)+4O2(g)---->3CO2(g)+3H2O(g) delta H rxn=-1790kJ. If a bottle of nail polish remover contains 179mL of acetone, how much heat would be released by its complete combustion? the density of...
Friday, October 17, 2008 at 3:35pm by natash

Inorganic chemistry
The thermochemical equation for the combustion of hexane is shown below. C6H14(g) + 19/2Os(g) ==> 6CO2(g) + 7H2O(g) Delta H = -4163kJ What is the enthalpy change for the combustion of 2.50g C6H14? 2.50 g/86g = .029 mol -4163kJ/.029 = -1.43 x 10^5kJ
Tuesday, May 12, 2009 at 6:43am by Steve

Chemistry
Molar volume of an ideal gas at S.A.T.P. (25oC and 1.00 bar is 24.8 dm3 mol-1. Assume that gases are at 225oC and P=1.00 atmosphere before and after the combustion and behave as ideal gases. The chemical equation for the combustion of butane is: 2C4H10(g) + 13O2(g) &#8594...
Friday, February 10, 2012 at 6:28am by JRMM

chemistry
You need the heat of combustion for ethylene. C2H4 + 3O2 ==> 2CO2 + 2H2O 450 kJ/heat combustion per mole = # moles C2H4 burned. Then # moles C2H4 x molar mass C2H4 = grams C2H4.
Sunday, November 15, 2009 at 6:03pm by DrBob222

typo--CHEMISTRY: URGENT
I made a typo in my last post. I wrote about half way into that second equation explanation a (7/2)cc and it should have been (7/2)y cc if you can locate and make the change. As for the equations, for the first problem it is true that H2O was not one of the residual gases; ...
Monday, October 29, 2012 at 10:48pm by DrBob222

Chemistry Help!!
Propane(C3H8), the major component of LP game, is often used as heating and cooking fuels in homes. When propane is burned( reacted with oxygen), CO2(g) and H2O(g) are produced. 1) Write an equation for the reaction and calculate the enthalpy change for the combustion of ...
Wednesday, October 12, 2011 at 1:47pm by Maci

chemistry
There are various thermodynamic cycles in internal combustion and "steam" external combustion engines. I suggest you review Otto cycle (four-stroke automobile), Stirling cycle, Clerk cycle (two stroke), Diesel cycle and Rankine cycle (steam), using Google.
Thursday, February 11, 2010 at 3:26am by drwls

Chem
The following substances undergo complete combustion in a bomb calorimeter. The calorimeter assembly has a heat capacity of 5.136 ^ C. In each case, what is the final temperature if the initial water temperature is 22.37^ C? 0.3268g caffeine, C8H10N4 (heat of combustion = -...
Monday, October 29, 2012 at 2:02am by Alex

College Chem involving heat of combustion
Calculate the heat of combustion: 1.C2H4(g)+3O2(g)===>2CO2(g)+2h20(L) _____kJ/mol 2.2H2S(g)+3O2(g)===>2H2O(L)+2SO2(g) _____kJ/mol
Sunday, October 31, 2010 at 9:08pm by Anonymous

Chemistry 1201
Butane, C4H10, is a component of natural gas that is used as fuel for cigarette lighters. The balanced equation of the complete combustion of butane is 2C4H10(g)+13O(g)-> 8CO2(g)+10H2O(l) At 1.00 atm and 23C , what is the volume of carbon dioxide formed by the ...
Sunday, April 15, 2012 at 11:21pm by John

Chemistry
If you used that equation, you are not going to get the right answer. Heat of combustion is often tabulated in kJ/mole OR kJ/gram Lets do it in moles. Heatcombustion*molesMethanol=heatcapacity*(Tf-Ti) heatcombustion*17.62/32.04=4.5kJ/C*(78.03C) solve for heat combustion in J/...
Tuesday, June 19, 2012 at 5:28pm by bobpursley

chemistry
Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 70. cm3. If the combustion of this mixture releases 885 J of energy, to what volume will the gases expand against a constant pressure of 645 torr if all the energy of combustion is...
Monday, October 22, 2012 at 8:29pm by Brandon

Chemistry
Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 50. cm3. If the combustion of this mixture releases 990. J of energy, to what volume will the gases expand against a constant pressure of 645 torr if all the energy of combustion ...
Thursday, October 13, 2011 at 2:01am by Sam

Chemistry
When 0.312g of glucose was burned in a bomb calorimeter (heat capacity 641 J/K) the temperature rose by 7.739 K. Calculate the standard enthalpy of combustion and the standard internal energy of combustion. I've calculated the standard enthalpy but am unsure of how to go ...
Tuesday, September 25, 2012 at 11:39pm by Kalli

College Chemistry
Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 50. cm3. If the combustion of this mixture releases 955 J of energy, to what volume will the gases expand against a constant pressure of 675 torr if all the energy of combustion is...
Monday, October 31, 2011 at 3:16pm by Amanda

Chemistry
A 3.000 gram sample of an unknown compound containing the elements carbon, hydrogen, and nitrogen is analyzed by combustion. The combustion releases 4.714 grams of carbon dioxide and 1.500 grams of nitrogen. If 25 molecules have a combined mass of 4.65 x 10⁻²&...
Tuesday, October 18, 2011 at 5:59pm by Mom

Chemistry
Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 30. cm3. If the combustion of this mixture releases 980. J of energy, to what volume will the gases expand against a constant pressure of 640. torr if all the energy of combustion ...
Thursday, November 18, 2010 at 3:45pm by Mattie

chemistry
A 1.800 g sample of octane, C8H18, was burned in a bomb calorimeter whose total heat capacity is 11.66 kJ/°C. The temperature of the calorimeter plus contents increased from 21.12°C to 29.85°C. What is the heat of combustion per gram of octane? What is the heat of ...
Thursday, January 31, 2013 at 2:01am by evgeny

Chemistry
a)What mass of water is produced from the complete combustion of 2.30×10−3 g of methane? b)What mass of oxygen is needed for the complete combustion of 2.30×10−3 g of methane? This is the unbalanced equation given: CH4+O2->CO2+H2O
Tuesday, September 21, 2010 at 1:29pm by Cindy

Chemistry
The combustion of 0.0222g of isooctane vapor, C8H18(g), at constant pressure raises the temperature of a calorimeter 0.400 degrees C. The heat capacity of the calorimeter and water combined is 2.48kJ/degrees C. Find the molar heat of combustion of gaseous isooctane. The ...
Tuesday, October 9, 2012 at 7:46pm by Heather

Chemistry+balancing equation tips
We are on combustion reaction at the moment in chemistry, and I have to say, these reactions are like extremely hard to balance(well, just alot of erasing). It takes me a while to balance combustion reactions and I want to know if theres any tips in balancing them? Should I ...
Thursday, February 19, 2009 at 5:48pm by Chopsticks

Chemistry
Which of the two, benzoic acid and sucrose, has the largest heat of combustion and why? Can you look up the heats of combustion. I found -3226.9 kJ/mol for benzoic acid and -5637 kJ/mol for sucrose but you should look for yourself and confirm those numbers. Write the combusion...
Monday, March 26, 2007 at 5:32pm by Amy

Chemistry
When 0.3212g of glucose was burned in bomb calorimeter of calorimeter constant 641J/K, the temperature rose by 7.943 K. Calculate a) the standard molar internal energy of combustion b) the standard enthalpy of combustion and c) the standard enthalpy of formation of glucose. (...
Tuesday, May 4, 2010 at 12:03am by Nadira

chemistry
When 0.558g of biphenyl (C_12H_10) undergoes combustion in a bomb calorimeter, the temperature rises from 25.7^\circ C to 30.1^\circ C. Find DeltaE_rxn for the combustion of biphenyl in kJ/mol biphenyl. The heat capacity of the bomb calorimeter, determined in a separate ...
Wednesday, December 19, 2012 at 6:51pm by savannah

Chemistry - Combustion Method
This question is confusing me the way its presented and also is relating it to the combustion method that is used to analyze carbon and hydrogen. It can be used to give percent N. It says a sample of a compound that weighs 8.75 mg gave 1.59 mL of N2 at 25 degrees Celsius and ...
Saturday, May 1, 2010 at 9:49pm by Shinu

college Chemistry
Why was there condensation of the beaker of cold water when a blue flame was passes underneath? This experiment is from the Gas Burner experiment. A) the product of carbon dioxide from combustion (B) the product of hydrogen dioxide from combustion (C) left over unburned oxygen...
Sunday, December 5, 2010 at 1:50am by Ivy

Science
Assume you can heat water with perfect insulation (all the heat from combustion of ethanol is transferred to water). What is the volume of ethanol required to heat 100 mL of water by 10 degrees C? (You will need to look up density of ethanol, specific heat capacity or water, ...
Thursday, March 21, 2013 at 2:08am by Alexandra

chemistry
While researching energy values of fuels, a chemist designed an experiment to find out the heat of combustion of pentane. Using the known hexane heat of combustion of hexane = 4650kJ/mol and the data below calculate the heat of combustion of pentane. Set up= copper beaker 42....
Sunday, March 28, 2010 at 2:32am by sarah

chemistry
The combustion of 0.0222g of isooctane vapor, C8H18(g), at constant pressure raises the temperature of a calorimeter 0.400 C. The heat capacity of the calorimeter and water combined is 2.48 kJ/C. Find the molar heat of combustion of gasdeous isooctane. C8H18(g)+12 1/2O2(g) to ...
Saturday, February 5, 2011 at 2:42am by Anonymous

chemistry
Problem#9: Consider the fuel octane (the main component of gasoline) and its combustion reaction 2C8H18(l) + 25O2(g) → 16CO2(g) + 18H2O(l) ΔHo = -10,942 kJ The “fuel value” of a fuel (unit kJ/g) is defined as the energy released when 1 g of the ...
Thursday, October 21, 2010 at 1:28pm by Sarah

chem expirement!
You are required to design an experiment to test Hess's law using the combustion of ethanol. Write a brief design for this experiment. What I wrote as my answer: Hess’ Law: is the algebraic addition of chemical equations yields a net equation whose enthalpy of ...
Thursday, May 17, 2007 at 12:28pm by rob

Chemistry
A XX-g sample of methane, CH4, is mixed with YY atm of O2 (an excess) in a VV L combustion chamber at 125.0°C. The combustion reaction to CO2 and H2O is initiated and the vessel is cooled back to 125.0°C. What is the final pressure in the combustion chamber assuming ...
Sunday, February 25, 2007 at 8:34pm by Jack

chem 101
Biphenyl (C1 2H1 0) burned in a bomb calorimeter in order to determine its heat of combustion. The heat capacity of the calorimeter was 5.86 kJ/°C When 0.514 g of biphenyl was burned, the temperature of the calorimeter increased from 25.8 °C to 29.4 °C. Determine ...
Wednesday, April 11, 2012 at 3:34pm by Anonymous

Chemistry
A)What mass of carbon dioxide is produced from the complete combustion of 7.00×10−3 g of methane? B)What mass of oxygen is needed for the complete combustion of 7.00×10−3 g of methane?
Monday, October 3, 2011 at 8:48pm by Hannah

chemistry
An unidentified compound (A) was reacted with bleach using the same experimental protocol as that performed in the lab. Molecule B was formed. Answering the questions below should allow you to interpret the following information in order to determine the structures of A and B...
Wednesday, June 15, 2011 at 1:08am by Anonymous

Chemistry
2. When a 1.000 g sample of the rocket fuel hydrazine, N2H4, is burned in a bomb calorimeter which contains 1200g of water, the temperature rises from 24.62C to 28.16C. If the C for the bomb is 840 J/C Calculate: q reaction for combustion of a one-gram sample and q reaction ...
Tuesday, March 8, 2011 at 11:05pm by Johnny

Combustion
In a combustion reaction, do the products or the reactants store more energy? It is the products right? As heat energy goes into the products. Potential energy is greater in the reactants. Heat is lost in the reaction, so the products have lower energy. Imagine wood before it ...
Friday, March 2, 2007 at 9:39pm by Steve

Chemistry
Consider the following thermochemical equation for the combustion of acetone (C3H6O), the main ingredient in nail polish remover: C3C6O + 4 O2 --> 3 CO2 + 3H2O DELTA Hrxm= -1790kJ If a bottle of nail polish remover contains 183 mL of acetone, how much heat would be ...
Monday, March 19, 2012 at 10:27pm by Ashley

Chemistry
H2O2 + Heat = H2O + O2 Would this be combustion or decomposition? Since the products are H2O and O2, I thought it would be combustion but then H2O can be decompose into H2O and O2 which would be decomposition.
Sunday, January 13, 2013 at 7:28pm by Shadow

Chemistry
The sugar arabinose, C5H10O5, Molar Mass = 150.15 g/mole, was completely combusted with excess oxygen in a calorimeter. Combustion of a 0.548 g sample of arabinose caused the temperature to increase from 20.00 degrees C to 20.54 degrees C in a calorimeter with a total heat ...
Wednesday, November 2, 2011 at 11:11pm by Anonymous

chemistry
Combustion reactions involve reacting a substance with oxygen. When compounds containing carbon and hydrogen are combusted, carbon dioxide and water are the products. Using the enthalpies of combustion for C4H4 (-2341 kJ/mol), C4H8 (-2766 kJ/mol) and H2 (-286 kJ/mol), ...
Tuesday, December 28, 2010 at 1:34pm by Lux

Chemistry
The combustion of carbon disulfide in the presence of excess oxygen yields carbon dioxide and sulfur dioxide: CS2(g)+3O2(g)--->CO2(g)+2SO2(g) The combustion of 17.2 g of CS2 in the presence of excess oxygen yields __________ g of SO2.
Saturday, December 11, 2010 at 6:03pm by Dante

chemistry
Assuming the molor mass of paraffin is 280 g/mol, calculate the # of mols of paraffin burned. Then calculate the heat of combustion of paraffin in kJ/mol I don't think I can help you with the information provided. We need an equation (although we can wing that one) but we ...
Tuesday, September 26, 2006 at 9:37pm by dan

Chemistry 2 ap
Yes. I wondered if confuded was a new word I should learn. I think the problem is a stoichiometry problem IF you know the heat of combustion. Do you know that? If so, then C3H8 + 5O2 ==> 3CO2 + 4H2O So it takes 44 g C3H8 to generate ??kJ (the heat of combustion ...
Thursday, October 28, 2010 at 2:48pm by DrBob222

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