what is always required for a state of change to occur?

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Has to do with chemistry.... If it helps...

2007-05-05 14:43:23 · 2 answers · asked by gabigab_13 1 in Science & Mathematics ➔ Chemistry

Outside interference.

2007-05-05 14:46:45 · answer #1 · answered by Oldvet 4 · 0⤊ 0⤋

There must be an energy transfer.

From solid to liquid, and liquid to gas, energy must be added.

the reverse is true in the other direction

2007-05-05 14:46:52 · answer #2 · answered by reb1240 7 · 0⤊ 0⤋