Answer 2_5_10
Water has a specific heat capacity of 4200 J kg-1 K-1. What is the amount of energy that is needed to bring 1.5 kg water to the boil from 20 oC?
Formula first: Q = mcDq
Temperature change = 100 - 20 = 80 o C (= 80 K)
Energy = 1.5 kg x 4200 J kg-1 K-1 x 80 K
Energy = 504 000 J