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.
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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.
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