Question #243331

A cup of coffee (100 g) cools from 90˚C down to comfortable room temperature 25.˚C. How much energy does it release to the surroundings?


1
Expert's answer
2021-09-28T07:38:25-0400

The energy release during cooling is


Q=cm(tf−ti)=4200⋅0.1(25−90)=27300 J.Q=cm(t_f-t_i)=4200·0.1(25-90)=27300\text{ J}.


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