Question

Helium atom is two times heavier than hydrogen molecule. At 25°C, the kinetic energy of He atom is (1) Double than hydrogen (2) Same as hydrogen (3) Four times than hydrogen (4) Half than hydrogenj​

Answer 1

Answer:

(2) same as hydrogen

Explanation:

He atom is twice heavier than hydrogen molecule .At 25°c ,the Ke of He atom is same as hydrogen . kinetic energy of 1 mole of gas is 3/2

rt

thus the average kinetic energy of 1 mole of any gas is directly proportional to it's absolute temperatureand independent of molar mass

Answer 2

Answer:

Correct option is B)

Kinetic energy per mole or per molecule of a gas depends only on the temperature and not on the nature of the gas.

KE=

2

3

RT

So, average kinetic energy of a helium atom is the same as that of a hydrogen molecule.