Law of Equipartition of Energy

IMPORTANT

Law of Equipartition of Energy: Overview

This topic discusses the example of two independent axes of rotation of a diatomic molecule. The law of equipartition of energy is illustrated with formulas and derivation here.

Important Questions on Law of Equipartition of Energy

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The translational kinetic energy of 1 g molecule of a gas, at temperature 300 K is R=8.31 J mol-1 K-1

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State the types of degrees of freedom of non-rigid diatomic molecules.

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Non-rigid diatomic gas molecules have both translaion and rotational degree of freedom.

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

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Why the maximum possible degrees of freedom are more for a non-rigid diatomic molecule as compared to a rigid diatomic molecule?

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Two vibrational energy terms in the total energy of a non-rigid diatomic molecule, are present due to the kinetic energies of the two vibrating atoms.

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

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There are _____ translational degrees of freedom and three rotational degrees of freedom of Ozone.

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The number of translational degrees of freedom for a diatomic gas is 

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

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Choose the wrong options.

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

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

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Two ideal monatomic gases A and B at 27  and 37  are mixed. The number of moles in gas A is 2 and number of moles in gas B is 3. What will be the temperature of the mixture?

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The kinetic energy of 1kg of oxygen at 300K is 1.356×106J. Find the kinetic energy of  4kg of oxygen at 400K.

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State the law of equipartition  of energy. 

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Using expression for pressure exerted by gas, deduce expression for 

Kinetic energy per mole or kilomole.

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Using expression for pressure exerted by gas, deduce expression for 

Kinetic energy per unit volume 

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Using expression for pressure exerted by gas, deduce expression for 

Kinetic energy of a gas 

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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