The value of gamma 'γ' for polyatomic gases is:
Correct answer: B. 1.29
- A. 0.8
- B. 1.29
- C. 1.42
- D. 1.66
Explanation
The ratio of the specific heats γ=CP/CV is a factor in adiabatic engine processes and in determining the speed of sound in a gas.This ratio γ for polyatomic gases(more than 2 atoms) is 1.29.This ratio γ = 1.66 for an ideal monoatomic gas and γ = 1.4 for air, which is predominantly a diatomic gas.
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
Which one is true about Cp and Cv?
The value of Cv for monoatomic gas is:
During an adiabatic process, the pressure of the gas is found to be proportional to the fourth power of temperature. The ideal gas would be;
Which one of the following formulae is INCORRECT?
For 3 moles of gas, Cp-Cv=
If 1 mole of an ideal gas is heated at constant volume so that its temperature rises by delta T, then first law of thermodynamics can be written as: