bescause gases have more kinetic energy
the distance between the particles and the average kinetic movement of the particles.
The kinetic theory states that when a solid is heated the bonds between the particles are loosened thus making it a liquid.
A gas has greater kinetic energy than a liquid and solid because its molecules are spaced farther apart, which allows more movement.
Liquid has a shape that can vary because particles of a liquid can flow to new locations.
Intermolecular distance in liquid is very less than in gas. When we give energy to the liquid, molecules get kinetic energy and they have now random movement which is in gaseous state.
Kinetic energy is the energy of motion. Heat is a form of kinetic energy (the movement of individual atoms or molecules) so the liquid phase contains more kinetic energy than the solid and the gas phase has more kinetic energy than the liquid phase. However, kinetic energy can also be imparted to a mass as a whole in which case if the total mass of the phases was constant the this imparted kinetic energy would be the same for all phases.
Because its particles are free to move, a liquid has no definite shape. However, it does have a definite volume.
The particles in a liquid have less kinetic energy than the particles in a gas.
Temperature is a measure of kinetic energy. Because liquid nitrogen is very cold, a system's kinetic energy will be collisionally transferred to the added liquid nitrogen. Thus, in general, adding liquid nitrogen will decrease a system's kinetic energy. (There are some exceptions where the system has less kinetic energy than the liquid nitrogen, such as liquid helium.)
Sound is the movement of a medium at frequencies we can hear. As it always involves movement of a medium, either a solid, liquid or gas to be transmitted it will involve kinetic energy at times. Note that kinetic energy is the energy stored in a moving mass. Sound waves carry energy with a combination of both kinetic and potential energy. There are two moments in every cycle where there is no movement and therefore no kinetic energy. These two points are at the upper and lower peaks of the wave.