# Chemical Process Calculation Questions and Answers – Heat Capacity

This set of Chemical Process Calculation Multiple Choice Questions & Answers (MCQs) focuses on “Heat Capacity”.

1. The amount of heat required to raise the temperature of the unit mass of gas through one degree at constant volume is
a) Cv
b) Cp
c) Latent heat
d) none of the mentioned

Explanation: The amount of heat required to raise the temperature of the unit mass of gas through one degree at constant volume is Cv.

2. The amount of heat required to raise the temperature of the unit mass of gas through one degree at constant pressure is
a) Cv
b) Cp
c) Latent heat
d) none of the mentioned

Explanation: The amount of heat required to raise the temperature of the unit mass of gas through one degree at constant pressure is Cv.

3. Which one of correct relation ?
a) Cp + Cv = 0
b) Cp = 1 + R/Cv
c) 1 = Cp/Cv
d) Cp = R + Cv

Explanation: Cp = R + Cv.

4. The heat capacity depends on whether the heat is added at constant __________ or constant ________
a) Volume, Temperature
b) Pressure, Volume
c) Pressure, Temperature
d) Temperature, Pressure

Explanation: The heat capacity depends on whether the heat is added at constant Pressure or constant Volume.

5. measurement of Cp is _______ than Cv.
a) Safer
b) Dangerous
c) Can`t say
d) None of the mentioned

Explanation: Heat capacity measurements at constant volume are dangerous because the container can explode.
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6. For an mono atomic ideal gas Cv is
a) 1.5 R
b) 2.5 R
c) 3.5 R
d) 4.5 R

Explanation: For a mono atomic gas Cv = 1.5 R.

7. For a diatomic gas, Cv is
a) 1.5 R
b) 2.5 R
c) 3.5 R
d) 4.5 R

Explanation: For a diatomic gas Cv = 2.5 R.

8. For an ideal mono atomic gas
a) Cp = Cv + 1.5 R
b) Cp = Cv + R
c) Cp = Cv – 1.5 R
d) Cp = Cv – R

Explanation: For an ideal gas: Cp = Cv + R.

9. Consider He gas an ideal gas, What is Cv for He?
a) 1.5 R
b) 2.5 R
c) 3.5 R
d) 4.5 R

Explanation: For a diatomic gas Cv = 2.5 R.

10. Consider N2 gas an ideal gas, What is Cv for N2?
a) 1.5 R
b) 2.5 R
c) 3.5 R
d) 4.5 R

Explanation: For a diatomic gas Cv = 2.5 R.

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