ZuoTi.Pro
Question

5. The heats of combustion of methane and butane are 890 kJ/mol, and 2876 kJmol. respectively. How much heat will be produced by combusting 125 g of each? Which will generate more heat for the same volume of gas? Explairn.

science   chemistry   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

The heat of combustion of 1 mol of methane = 890 kJ

1 mole of methane = 16 g of methane

Number of moles of methane in 125 g = 125/16 = 7.8125 moles

Heat of combustion of 125 g of methane = 7.8125*890 = 6953.125 kJ

The heat of combustion of 1 mol of butane = 2876 kJ/mol

1 mole of butane = 58.12 g

Number of moles of butane in 125g = 125/58.12 = 2.15 mol

Heat of combustion = 2.15*2876 = 6185.4 kJ

Butane would give more heat than methane for the given volume because it has more number of hydrogen atoms than methane.

0 0
Add a comment
Know the answer?
Add Answer to:
5. The heats of combustion of methane and butane are 890 kJ/mol, and 2876 kJmol. respectively....
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • The heats of combustion of ethane (C2H6) and butane (C4H10) are 52 kJ/g and 49 kJ/g,...

    The heats of combustion of ethane (C2H6) and butane (C4H10) are 52 kJ/g and 49 kJ/g, respectively. We need to produce 1.000 x 103 kJ heat by burning one of the fuels. Which fuel will emit the least amount of CO2? 1. Calculate the number of grams needed of each fuel: 2. Calculate the number of moles of each fuel: 3. Write down the balanced chemical equation for the combustion of the fuels: 4. Calculate the number of moles of...

  • Use the combustion of methane for the following question: CH4 (g) +        O2 (g) → CO2...

    Use the combustion of methane for the following question: CH4 (g) +        O2 (g) → CO2 (g) +         H2O (l)                    ∆H = -890 kJ/mol A)Is the reaction exothermic or endothermic? B)If I combust 2 mol of methane, how much heat is absorbed or released - use the appropriate sign to indicate in your answer. C) If I combust 12.5 g of methane, how much energy in kJ is absorbed or released? Use the appropriate sign in your answer.

  • The combustion of methane (natural gas) is given by the equation: CH4 (g) + 2 O2...

    The combustion of methane (natural gas) is given by the equation: CH4 (g) + 2 O2 (g)  →  CO2 (g) + 2 H2O (g)   ΔH = -890 kJ How much heat (in kJ) is released by the reaction of 48.5 grams of O2 with excess CH4? Remember that if heat is given off, is negative, and should be entered as such)

  • Consider our dear friend, the combustion of methane/natural gas: CH4 (g) + 2 O2 (g) →...

    Consider our dear friend, the combustion of methane/natural gas: CH4 (g) + 2 O2 (g) → 2 CO2 (g) + H2O (l) ΔHreaction = -802.3 kJ/mol If 1.50 mol O2 are consumed, how much heat is produced by this reaction?

  • 8. How many kJ are produced in the combustion of 0.150 mol of methane, if 802...

    8. How many kJ are produced in the combustion of 0.150 mol of methane, if 802 kJ/mol are released in a balanced reaction? a) 0.0802 kJ b) 0.160 kJ c) 40.1 kJ d) 80.2 kJ e) 120. k) 9. In the reaction of aluminum and iron(III) oxide to form iron and aluminum oxide, AH is -850 kJ. How many moles of aluminum are reacted when 650 kJ of heat are released? a) 0.75 mol b) 1.0 mol c) 1.5 mol...

  • 7A) Butane has a heat of combustion of -2882 kJ/mol. If a 10.09 g sample of...

    7A) Butane has a heat of combustion of -2882 kJ/mol. If a 10.09 g sample of butane is burned in a bomb calorimeter containing 2.610 kg of water initially at 20.13 degrees C, find the final water temperature. 7B) A sample of ethanol (CH3CH2OH) increases the temperature of the bomb calorimeter in Question 7A by 4.71 degrees C. If the heat of combustion of ethanol is -1407 kJ/mol, what was the mass of the ethanol sample? I only need the...

  • Butane (C4H10) has a heat of combustion of -2882 kJ/mol. If a 10.09 g sample of...

    Butane (C4H10) has a heat of combustion of -2882 kJ/mol. If a 10.09 g sample of butane is burned in a bomb calorimeter containing 2.610 kg of water initially at 20.13 degrees C, find the final water temperature.

  • The heat of combustion of heptane and isooctane are -4501 kJ/mol and -5100 kJ/mol, respectively. ...

    The heat of combustion of heptane and isooctane are -4501 kJ/mol and -5100 kJ/mol, respectively. Isooctane (2,2,4-trimethylpentane, pronounced iso-octane) is a pretty good model for the complex mixture of hydrocarbons that is gasoline. The density of these two liquids (essentially the same for all liquid hydrocarbons) is 0.7 g/mL (kg/dm3). What is the heat of combustion of one gallon of the two liquids? Are they essentially the same or quite different? Why? a. b. The U.S. Congress (our representatives) mandated...

  • Problem: Bapco needs to burn natural-gas fuel that contains 75 mol% methane, 15 mol% ethane, and ...

    Problem: Bapco needs to burn natural-gas fuel that contains 75 mol% methane, 15 mol% ethane, and 10 mol% nitrogen. The following two reactions takes place: CH4(g) 20209) CO2(0) 2H2o) C2H6 (g) + 3.502(g) 2C02(g)3H20 (g) a) What is the standard heat of combustion (kJ/mol) of the fuel at 25 oC with water(g) as a product b) The fuel is supplied to a furnace with 60% excess air, both entering at 250C. The products leave at 600°C. If the combustion is...

  • 1) The heat of combustion for n−heptane, C7H16, is 4,817 kJ/mol. How much heat is released...

    1) The heat of combustion for n−heptane, C7H16, is 4,817 kJ/mol. How much heat is released if 350 kg of this liquid burns completely? 2) The heat of combustion for ethane, C2H6, is 47.8 kJ/g. How much heat is produced if 7.0 moles of ethane undergo complete combustion?

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT