# Heat exchange

i would like to know more about the heat exchange in mixtures and thermodynamics
example would be like:

How much heat energy is required to change?
a) 2.0kg of ice at 0 C to water at 0 C?

b) 500g of water at 100 C to steam at 100 C?

## Answers and Replies

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Andrew Mason
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gomani said:
i would like to know more about the heat exchange in mixtures and thermodynamics
example would be like:

How much heat energy is required to change?
a) 2.0kg of ice at 0 C to water at 0 C?

b) 500g of water at 100 C to steam at 100 C?
These change of state transitions are the result of molecules having sufficient energy to overcome bonds with other water molecules. This bond-breaking heat energy does not increase temperature (ie molecular kinetic energy) and is called latent heat (of fusion / vaporization). Just look up these latent heats to find the heat energy involved in each of these examples.

AM