Question

Particles in gas have very large kinetic enetgy

Answer 1

kinetic energy of gas particle is directly proportional to the temperature. An increase in temperature increase the speed in which the gas molecules move. all the gases at a given temperature have the same average kinetic energy. lighter gas molecules move faster than heavier molecules.

Answer 2

because at solid stage they stored energy from latent heat of fusion and at liquid stage it once again got energy from latent heat heat of vaporisation so now it have so much temperature and we know that temperature is directly proportional to kinetic energy . so that's why it have large kinetic energy.