Physics A level- Thermodynamics-Internal Energy (Potential energy)Watch
Ideal gases have no potential and only KE and at 0 Kelvin, molecules have no energy?
As you go from solid to liquid to gas IE increases and so does KE. Remember that the values for PE are negative so when someone says at a gas the. Potential is zero, it's is still higher than in liquid or solid phase. For example, a liquid has - 20J PE, when in its gaseous state, its potential energy (and therefore internal energy) has INCREASED and now is 0