Answer to Question #276670 in Physics for Hutchii

Question

Solve the problem with complete solutions. Determine the amount of heat released by a 3.0 kg of water when it cools from 80 degree Celsius to 10 degree Celsius.

Answer 1

The amount of heat released is

$$Q=cm(t_f-t_i),\\ Q=4200·3·(10-80)=-882000\text{ J}.$$