How can water vapor become ice? Water vapor can become liquid water through the release of heat energy, and then become ice through the release of more heat energy. Water vapor cannot become ice directly through the release of heat energy. Water vapor can become liquid water through the release of heat energy, and then become ice through the release of more heat energy. Water vapor can also become ice directly through the release of heat energy. Water vapor can become liquid water through the addition of heat energy, and then become ice through the addition of more heat energy. Water vapor cannot become ice directly through the addition of heat energy. Water vapor can become liquid water through the addition of heat energy, and then become ice through the addition of more heat energy. Water vapor can also become ice directly through the addition of heat energy