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In the complete combustion of C2H6, 54 g of H2O is formed and 370 kcal of heat is evolved. Thus, ΔCH° of C2H6 is
- a)370 kcal mol-1
- b)6.61 kcal mol-1
- c)-6.61 kcal mol-1
- d)-370 kcal mol-1
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
In the complete combustion of C2H6, 54 g of H2Ois formed and 370 kcal ...
54 gram of water is formed or three moles of water is formed.
C2H6 + (7/2)O2 → 2CO2 + 3H2O
So it indicates that only one mole of C2H6 is used in the combustion so the heat released is itself the value of heat of combustion of Ethane.
C2H6 + (7/2)O2 → 2CO2 + 3H2O
So it indicates that only one mole of C2H6 is used in the combustion so the heat released is itself the value of heat of combustion of Ethane.
Most Upvoted Answer
In the complete combustion of C2H6, 54 g of H2Ois formed and 370 kcal ...
Given information
- In the complete combustion of C2H6, 54 g of H2O is formed
- 370 kcal of heat is evolved
To find
- CH of C2H6
Solution
1. Write the balanced equation for the combustion of C2H6:
C2H6 + 3O2 → 2CO2 + 3H2O
2. Calculate the number of moles of H2O formed:
Molar mass of H2O = 18 g/mol
Number of moles of H2O = 54 g / 18 g/mol = 3 moles
3. Calculate the amount of heat evolved:
Amount of heat evolved = 370 kcal
4. Calculate the amount of heat evolved per mole of C2H6:
Amount of heat evolved per mole of C2H6 = 370 kcal / 2 moles = 185 kcal/mole
5. Calculate the CH of C2H6:
CH of C2H6 = -185 kcal/mole
6. The negative sign indicates that the combustion of C2H6 is an exothermic process, meaning that heat is released during the reaction.
Therefore, the correct answer is option 'D', which is -370 kcal mol-1.
- In the complete combustion of C2H6, 54 g of H2O is formed
- 370 kcal of heat is evolved
To find
- CH of C2H6
Solution
1. Write the balanced equation for the combustion of C2H6:
C2H6 + 3O2 → 2CO2 + 3H2O
2. Calculate the number of moles of H2O formed:
Molar mass of H2O = 18 g/mol
Number of moles of H2O = 54 g / 18 g/mol = 3 moles
3. Calculate the amount of heat evolved:
Amount of heat evolved = 370 kcal
4. Calculate the amount of heat evolved per mole of C2H6:
Amount of heat evolved per mole of C2H6 = 370 kcal / 2 moles = 185 kcal/mole
5. Calculate the CH of C2H6:
CH of C2H6 = -185 kcal/mole
6. The negative sign indicates that the combustion of C2H6 is an exothermic process, meaning that heat is released during the reaction.
Therefore, the correct answer is option 'D', which is -370 kcal mol-1.
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In the complete combustion of C2H6, 54 g of H2Ois formed and 370 kcal of heat is evolved. Thus, ΔCH° of C2H6 isa)370 kcal mol-1b)6.61kcal mol-1c)-6.61kcal mol-1d)-370kcal mol-1Correct answer is option 'D'. Can you explain this answer?
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In the complete combustion of C2H6, 54 g of H2Ois formed and 370 kcal of heat is evolved. Thus, ΔCH° of C2H6 isa)370 kcal mol-1b)6.61kcal mol-1c)-6.61kcal mol-1d)-370kcal mol-1Correct answer is option 'D'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about In the complete combustion of C2H6, 54 g of H2Ois formed and 370 kcal of heat is evolved. Thus, ΔCH° of C2H6 isa)370 kcal mol-1b)6.61kcal mol-1c)-6.61kcal mol-1d)-370kcal mol-1Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the complete combustion of C2H6, 54 g of H2Ois formed and 370 kcal of heat is evolved. Thus, ΔCH° of C2H6 isa)370 kcal mol-1b)6.61kcal mol-1c)-6.61kcal mol-1d)-370kcal mol-1Correct answer is option 'D'. Can you explain this answer?.
In the complete combustion of C2H6, 54 g of H2Ois formed and 370 kcal of heat is evolved. Thus, ΔCH° of C2H6 isa)370 kcal mol-1b)6.61kcal mol-1c)-6.61kcal mol-1d)-370kcal mol-1Correct answer is option 'D'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about In the complete combustion of C2H6, 54 g of H2Ois formed and 370 kcal of heat is evolved. Thus, ΔCH° of C2H6 isa)370 kcal mol-1b)6.61kcal mol-1c)-6.61kcal mol-1d)-370kcal mol-1Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the complete combustion of C2H6, 54 g of H2Ois formed and 370 kcal of heat is evolved. Thus, ΔCH° of C2H6 isa)370 kcal mol-1b)6.61kcal mol-1c)-6.61kcal mol-1d)-370kcal mol-1Correct answer is option 'D'. Can you explain this answer?.
Solutions for In the complete combustion of C2H6, 54 g of H2Ois formed and 370 kcal of heat is evolved. Thus, ΔCH° of C2H6 isa)370 kcal mol-1b)6.61kcal mol-1c)-6.61kcal mol-1d)-370kcal mol-1Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 11.
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In the complete combustion of C2H6, 54 g of H2Ois formed and 370 kcal of heat is evolved. Thus, ΔCH° of C2H6 isa)370 kcal mol-1b)6.61kcal mol-1c)-6.61kcal mol-1d)-370kcal mol-1Correct answer is option 'D'. Can you explain this answer?, a detailed solution for In the complete combustion of C2H6, 54 g of H2Ois formed and 370 kcal of heat is evolved. Thus, ΔCH° of C2H6 isa)370 kcal mol-1b)6.61kcal mol-1c)-6.61kcal mol-1d)-370kcal mol-1Correct answer is option 'D'. Can you explain this answer? has been provided alongside types of In the complete combustion of C2H6, 54 g of H2Ois formed and 370 kcal of heat is evolved. Thus, ΔCH° of C2H6 isa)370 kcal mol-1b)6.61kcal mol-1c)-6.61kcal mol-1d)-370kcal mol-1Correct answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
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