On a winter day the temperature drops from - 15°c to - 25°c overnight. if a pan sitting outside contains 0.40 kg of ice, how much heat is removed from the ice for this temperature change?

Question

Kasen Green

Geography

27 June, 08:35

On a winter day the temperature drops from - 15°c to - 25°c overnight. if a pan sitting outside contains 0.40 kg of ice, how much heat is removed from the ice for this temperature change?

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Answers (1)

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Hood · Answer 1

The problem can be solve using the formula:

q = m cp dt

where q is the heat removed

cp is the heat capacity of the material (2.108 kJ/kg C for ice)

dt is the change temperature

q = (0.40 kg) (2.108 kj/kg C) (-25 - (-15) C)

q = - 8.432 kj

the negative sign indicates that it is removed