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Here is a question: When ice is being melted, its temperature doesn't change. So, when a steam is being liquified, does its temperature change or not? And is the heat transferred here calculated by Q=LM?

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The temperature at the boiling or condensation point remains the same for gas and liquid. 100 degrees Celsius for water at standard conditions. L called the Latent (meaning hidden) Heat of fusion times the mass of Water vapor, m, equals Q the Heat released.

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The transition from solid to liquid, from liquid to vapor, and back again, are phase changes. Temperature change is discontinuous at a phase change. There is no temperature change at that point.

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