Class 11 Exam > Class 11 Questions > In the combustion of 4g. of CH4, 2.5 K cal of...
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In the combustion of 4g. of CH4, 2.5 K cal of heat is liberated. The heat of combustion of CH4 is -
- a)20 K. cals
- b)10 K. cals
- c)2.5 K. cals
- d)5 K. cals
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
In the combustion of 4g. of CH4, 2.5 K cal of heat is liberated. The h...
Mol. wt. of methane =16gm
Heat liberated during the combustion of 4gm methane = 2.5kcal
Heat liberated during the combustion of 16gm methane = 2.5/4×16=10kcal
Hence the heat of combustion of methane is 10 kcal.
Heat liberated during the combustion of 4gm methane = 2.5kcal
Heat liberated during the combustion of 16gm methane = 2.5/4×16=10kcal
Hence the heat of combustion of methane is 10 kcal.
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In the combustion of 4g. of CH4, 2.5 K cal of heat is liberated. The h...
Given:
- Mass of CH4 = 4g
- Heat liberated in the combustion = 2.5 K cal
To find:
The heat of combustion of CH4
Solution:
The heat of combustion of CH4 is the amount of heat energy released when 1 mole of CH4 undergoes complete combustion.
Step 1: Convert the mass of CH4 to moles
- The molar mass of CH4 = 12.01 g/mol (C) + 1.01 g/mol (H) x 4 = 16.04 g/mol
- Moles of CH4 = Mass of CH4 / Molar mass of CH4
= 4g / 16.04 g/mol
= 0.2494 mol (approximately)
Step 2: Calculate the heat of combustion per mole of CH4
- Heat liberated in the combustion of 0.2494 mol of CH4 = 2.5 K cal
- Heat liberated in the combustion of 1 mol of CH4 = (2.5 K cal) / (0.2494 mol)
= 10.03 K cal (approximately)
Therefore, the heat of combustion of CH4 is 10.03 K cal, which is approximately equal to 10 K cal.
Answer:
The correct answer is option (b) 10 K cal.
- Mass of CH4 = 4g
- Heat liberated in the combustion = 2.5 K cal
To find:
The heat of combustion of CH4
Solution:
The heat of combustion of CH4 is the amount of heat energy released when 1 mole of CH4 undergoes complete combustion.
Step 1: Convert the mass of CH4 to moles
- The molar mass of CH4 = 12.01 g/mol (C) + 1.01 g/mol (H) x 4 = 16.04 g/mol
- Moles of CH4 = Mass of CH4 / Molar mass of CH4
= 4g / 16.04 g/mol
= 0.2494 mol (approximately)
Step 2: Calculate the heat of combustion per mole of CH4
- Heat liberated in the combustion of 0.2494 mol of CH4 = 2.5 K cal
- Heat liberated in the combustion of 1 mol of CH4 = (2.5 K cal) / (0.2494 mol)
= 10.03 K cal (approximately)
Therefore, the heat of combustion of CH4 is 10.03 K cal, which is approximately equal to 10 K cal.
Answer:
The correct answer is option (b) 10 K cal.
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In the combustion of 4g. of CH4, 2.5 K cal of heat is liberated. The heat of combustion of CH4is -a)20 K. calsb)10 K. calsc)2.5 K. calsd)5 K. calsCorrect answer is option 'B'. Can you explain this answer? for Class 11 2025 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about In the combustion of 4g. of CH4, 2.5 K cal of heat is liberated. The heat of combustion of CH4is -a)20 K. calsb)10 K. calsc)2.5 K. calsd)5 K. calsCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 11 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the combustion of 4g. of CH4, 2.5 K cal of heat is liberated. The heat of combustion of CH4is -a)20 K. calsb)10 K. calsc)2.5 K. calsd)5 K. calsCorrect answer is option 'B'. Can you explain this answer?.
In the combustion of 4g. of CH4, 2.5 K cal of heat is liberated. The heat of combustion of CH4is -a)20 K. calsb)10 K. calsc)2.5 K. calsd)5 K. calsCorrect answer is option 'B'. Can you explain this answer? for Class 11 2025 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about In the combustion of 4g. of CH4, 2.5 K cal of heat is liberated. The heat of combustion of CH4is -a)20 K. calsb)10 K. calsc)2.5 K. calsd)5 K. calsCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 11 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the combustion of 4g. of CH4, 2.5 K cal of heat is liberated. The heat of combustion of CH4is -a)20 K. calsb)10 K. calsc)2.5 K. calsd)5 K. calsCorrect answer is option 'B'. Can you explain this answer?.
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In the combustion of 4g. of CH4, 2.5 K cal of heat is liberated. The heat of combustion of CH4is -a)20 K. calsb)10 K. calsc)2.5 K. calsd)5 K. calsCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for In the combustion of 4g. of CH4, 2.5 K cal of heat is liberated. The heat of combustion of CH4is -a)20 K. calsb)10 K. calsc)2.5 K. calsd)5 K. calsCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of In the combustion of 4g. of CH4, 2.5 K cal of heat is liberated. The heat of combustion of CH4is -a)20 K. calsb)10 K. calsc)2.5 K. calsd)5 K. calsCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
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