Question

Calculate the heat when a 250 g sample of water is heated from 15◦c to 100◦
c.

Answer 1

In order to calculate the heat absorbed by the water, we require the specific heat capacity of water. This is 4.18 J/g. Now, we use the formula:
Energy = mass * specific heat capacity * change in temperature
Q = mcΔT
Q = 250 * 4.18 * (100 - 15)
Q = 88,825

The energy absorbed by the water is 88.8 kilojoules