This is related to the kinetic energy of the particles forming the gas. To changing a liquid into a gas, we must heat the liquid up. So particles in a gas move faster than particles in its liquid state. Hence the higher potential energy.

Gravitational Potential Energy is determined by three factors: mass, gravity, and height. All three factors are directly proportional to energy. Mass: The heavier the object is, the _______ gravitational potential energy the object has.

This energy, called heat of fusion or heat of melting, is absorbed by the particles as potential energy as the solid changes to a liquid.

Energy and State of Matter A pure substance in the gaseous state contains more energy than in the liquid state, which in turn contains more energy than in the solid state. Particles has the highest kinetic energy when they are in the gaseous state. Kinetic energy is related to heat (also called thermal energy).

Gases don’t have highest potential energy. Solid has the highest potential energy.

gas

The attractive forces between particles are strong enough to hold a specific volume but not strong enough to keep the molecules sliding over each other. The kinetic energy of the molecule is greater than the attractive force between them, thus they are much farther apart and move freely of each other.

London dispersion force

The prerequisite for this type of attraction to exist is partially charged ions—for example, the case of polar covalent bonds such as hydrogen chloride, HClstart text, H, C, l, end text. Dipole-dipole interactions are the strongest intermolecular force of attraction.