Question

A 2.0-kg copper kettle (specific heat capacity 0.385 J/g•°C) contains 0.500 kg of water at 20.0°C. How much heat is needed to raise the temperature of the kettle and its contents to 80.0°C?

Answer 1

In this case, you need to realize that the energy being added into the system is going into heating two materials, the kettle and the water. Therefore:

\[q=MC \Delta T+mc \Delta T\]
Plug in your numbers and you'll have your answer.