At ordinary temperature, the molecules of an ideal gas have only trans

1.	At ordinary temperature, the molecules of an ideal gas have only translational and rotational kinetic energies. At high temperatures they may also have vibrational energy. As a result of this at higher temperatures (Cv = molar heat capacity at constant volume) :–(a) Cv = 3R/2 for a monoatomic gas(b) Cv > 3R/2 for a monoatomic gas(c) Cv > 5R/2 for a diatomic gas(d) Cv = 5R/2 for a diatomic gas
Answer» Correct option (c) C_v > 5R/2 for a diatomic gas Explanation: Monoatomic gas C_v = 3R/2 This value is same for high temperature also, In case of diatomic gas C_v = 5R/2 (at low temperature) Also,C_v > 5R/2 (at high temperature due to vibrational kinetic energy)

At ordinary temperature, the molecules of an ideal gas have only translational and rotational kinetic energies. At high temperatures they may also have vibrational energy. As a result of this at higher temperatures (Cv = molar heat capacity at constant volume) :–(a) Cv = 3R/2 for a monoatomic gas(b) Cv > 3R/2 for a monoatomic gas(c) Cv > 5R/2 for a diatomic gas(d) Cv = 5R/2 for a diatomic gas

Answer»

Correct option (c) C_v > 5R/2 for a diatomic gas

Explanation:

Monoatomic gas C_v = 3R/2

This value is same for high temperature also, In case of diatomic gas

C_v = 5R/2 (at low temperature)

Also,C_v > 5R/2 (at high temperature due to vibrational kinetic energy)

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