The specific heat of a gas in adiabatic process is:
Correct answer: A. Zero
- A. Zero
- B. Infinite
- C. Negative
- D. Remains constant
Explanation
The specific heat of a gas in an adiabatic process is zero because there is no external pressure for the gas to expand against, the work done by or on the system is zero. Since this process does not involve any heat transfer or work, the first law of thermodynamics then implies that the net internal energy change of the system is zero. I.e. Q=W+U, U=0 and W=0 As C=q/mt, in adiabatic q=0, so according to equation,C=0
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Molar Specific Heat of a Gas
Molar specific heat is the heat required to raise the temperature of one mole of a gas by one kelvin, expressed through Q = nCΔT. Questions compare the constant volume value Cv with the constant pressure value Cp, apply the ideal gas relation Cp − Cv = R, and identify how the thermodynamic process affects heat capacity.
Practise Thermodynamics
714 free Thermodynamics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Molar Specific Heat of a Gas questions
The amount of heat required to raise the temperature of 10 moles of water from 70𝐾 to 80𝐾 (molar heat capacity of water 75.24𝐽) is:
The molar specific heat of a diatomic gas is measured at constant volume and found to be 29.1 J/mol.K. What are the types of energy that are contributing to the molar specific heat?
A fraction of internal energy is due to molecular vibration, which is different in different states of matter. Which of the following gives the correct order of fraction of internal energy due to molecular vibration?
Molar heat capacity at constant pressure is given by:
For a monoatomic ideal gas of 3 moles, Cp -Cv is:
The values of Cp and Cv are the same for: