[Physics] Water molecule Resonant Frequency

Question

If water is subjected to microwave energy at the water's exact resonant frequency but 90 degrees out of phase, would the water molecule cease vibrating? Would the water then freeze or be cooled at least?

Answer 1

Note that water molecules don't typically exist in isolation, and as they interact with other molecules their phase will change randomly.

While in principle it might be possible to extract a little bit of energy, sometimes, from an individual molecule if you hit it just right, in practice you can't do that on an ensemble of molecules.