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You happen to put your coffee cup down on a set of scales, and notice that over ...

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You happen to put your coffee cup down on a set of scales, and notice that over 10

minutes it loses 1.5g.

How many degrees C of cooling can you attribute to evaporation over this time?

Hint: The heat of transformation of vaporisation of water at 80C is 41.6 kJ/mol.

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