Question

Calculate the heat necessary to raise the temperature of 500kg of water in the generator of the refrigerator from 10degree Celsius to 40degree Celsius. The specific heat capacity of water equal to 4.2kj/kgk

Answer 1

heat=mass*specificheat*changetemp
=500kg*4.2kJ/kg-K*(40-10)C

now note on units, a Celcius degree change is the same as kelvins degree change, so your units will end up dividing, and leaving kJ