How much heat needs to be spent to turn 20 g of water taken at 20 degrees into steam.

The amount of heat is a measure of the change in the internal energy of the body and is determined by the formula Q = cmΔt.

Before solving the problem, let’s translate these values into the SI system:

m = 20 g = 0.02 kg

Δt = 100 ° – 20 ° = 80 °

Specific heat of water (c) – tabular value 4200 J / kg * ° C

Q = 4200 J / kg * ° C * 0.02 kg * 80 ° C = 6720 J