Heat Capacity
Easychemistry
The relation between Cp and Cv for an ideal gas is:
Select the correct option:
Solution
Incorrect! Answer:
Cp - Cv = R
Mayer's Relation for one mole of an ideal gas states: Cp−Cv=R
- Cp: Molar heat capacity at constant pressure.
- Cv: Molar heat capacity at constant volume.
- R: Universal gas constant.
- Physically, Cp is greater because at constant pressure, some absorbed heat is used for expansion work against the surroundings, whereas at constant volume, all heat goes into increasing internal energy.
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About This Question
- Subject
- chemistry
- Chapter
- chemical thermodynamics
- Topic
- heat capacity
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Cp - Cv = R
Mayer's Relation for one mole of an ideal gas states: Cp−Cv=R
- Cp: Molar heat capacity at constant pressure.
- Cv: Molar heat capacity at constant volume.
- R: Universal gas constant.
- Physically, Cp is greater because at constant pressure, some absorbed heat is used for expansion work against the surroundings, whereas at constant volume, all heat goes into increasing internal energy.
This easy difficulty chemistry question is from the chapter chemical thermodynamics, covering the topic of heat capacity. It appeared in the 2025 exam.
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