Degrees of Freedom and Law of Equipartition of Energy

IMPORTANT

Degrees of Freedom and Law of Equipartition of Energy: Overview

This topic covers concepts, such as, Monoatomic, Diatomic and Polyatomic Molecules, Equipartition of Energy & Relation Between Adiabatic Exponent and Degrees of Freedom etc.

Important Questions on Degrees of Freedom and Law of Equipartition of Energy

EASY
IMPORTANT

A poly atomic molecule has 3 translational, 3 rotational degrees of freedom and 2 vibrational modes. The ratio of specific heats CPCV is

MEDIUM
IMPORTANT

 

Name the type of the gas if its molar specific heat is given by RCv=0.67

MEDIUM
IMPORTANT

Rigid diatomic molecules of gas have how many rotational degrees of freedom?

EASY
IMPORTANT

The total number of degrees of freedom for a non-rigid diatomic molecule is equal to:

MEDIUM
IMPORTANT

The gases Carbon monoxide and Nitrogen at the same temperature have kinetic energies E1 and E2, respectively. Then,

MEDIUM
IMPORTANT

The number of degree of freedom for a rigid diatomic molecule is 

MEDIUM
IMPORTANT

A sample of gas consists of μ1 moles of mono-atomic molecules, μ2 moles of diatomic molecules and μ3 moles of linear triatomic molecules. The gas is kept at high temperature. What is the total number of degree of freedom?

MEDIUM
IMPORTANT

A container has one mole of mono-atomic ideal gas. Each molecule has f degrees of freedom. What is the ratio of γ =CpCv.

EASY
IMPORTANT

If CP and Cv denote the specific heats of unit mass of nitrogen gas at constant pressure and volume respectively, then:

EASY
IMPORTANT

Total number of degrees of freedom of a rigid diatomic molecule is

EASY
IMPORTANT

The mean kinetic energy of a vibrating diatomic molecule with two vibrational modes is (k= Boltzman constant and T= Temperature)

EASY
IMPORTANT

The average energy per mole of an ideal gas of number of degrees of freedom equal to nat temperatureT is _____.

HARD
IMPORTANT

When x amount of heat is given to a gas at constant pressure, it performs x3 amount of work. The average number of degrees of freedom per molecule of the gas is:

EASY
IMPORTANT

Let E be the kinetic energy of one mole of gas at temperature 300 K and E'at temperature 400 K. Find the value of E'E .

EASY
IMPORTANT

A gas has volume V and pressure P. What is the total translational kinetic energy of all the molecules of the gas ?

EASY
IMPORTANT

Calculate the ratio CpCv for a triatomic gas molecule. (Assume the molecule has translational and vibrational degrees of freedom)

MEDIUM
IMPORTANT

At temperature T, the R.M.S. velocity of hydrogen gas becomes equal to the escape velocity from the earth's surface. The value of T in K is

HARD
IMPORTANT

A diatomic molecule is moving without rotation or vibration with velocity vrms  such that it is oriented along x-axis. It strikes a wall in y-z plane while moving in positive x direction. The spring constant can be assumed to be K and time of collision is negligible. After all collisions are over,

HARD
IMPORTANT

The root mean square angular velocity of a diatomic molecule (with each atom of mass and interatomic distance $a$ ) is given by :

EASY
IMPORTANT

The specific heats CP and CV, of a diatomic gas A are 29 J mol-1K-1 and 22 J mol-1K-1 respectively. Another diatomic gas B, has the corresponding values as 30 J mol-1K-1 and 21 J mol-1K-1 respectively. Which among the following is correct?