Question

Assertion (A): Diatomic gas has 6 degrees of freedom. Reason (R): Diatomic gas has 6 degrees of freedom in total 3 from translational and 3 from rotational.

Assertion (A): Solid atom vibrating about its mean position in one dimension has 3 degrees of freedom Reason (R): Vibrating solid atom has linear, rotational and Vibrational energies.

Assertion(A): According to law of equipartition of energy each vibrational mode contributes 2 × ½ kB T = kB T. Reason (R): Since Vibrational mode involves rotation and revolution energies.

Specific heat capacity is defined in terms of heat required to raise the temperature of unit mass of a substance by unity. While molar specific heat is heat required to raise temperature of one mole of substance by unity. Generally in case of a gas we usually discuss about molar specific heat only but it does not imply that we cannot calculate specific heat of a gas. Generally we take two types of specific heats in gases at constant volume and at constant pressure.