Why state must be supplied with the most energy to turn it into a gas?

To turn a state of matter into a gas, we must overcome the intermolecular forces holding the particles together in that state. Gas particles have the highest energy out of all states of matter because they are not bound by these intermolecular forces, allowing them to move freely and independently from one another. This requires the input of the most energy to break these forces and transform the state into a gas.