In making a phase transition from a liquid state to a gas state, what must happen to the energy and particle motion is that b. Energy must be added, particles must move faster.
When phase transition from a liquid state to a gas state, there should be more of added energy, this is because  particles need energy to overcome the attractions between them.
As  as result of this  liquid gets warmer more particles have sufficient energy to escape, hence In making a phase transition from a liquid state to a gas state, what must happen to the energy and particle motion is that b. Energy must be added, particles must move faster.
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