Chemistry Question?

Question

A metal has a specific heat capacity of .899 Jg-1K-1 How much energy is required to raise the temperature of 2.00 kg of the metal by 80 K?

(A) 80 kJ
(B) 35.96 kJ
(C) 179800 kJ
(D) 143.84 J
(E) 143.84 kJ

Please explain.

Answer 1

Follow the units and the equation should be fairly clear:

Energy = specific heat * mass * temperature change
Energy = 0.899 J g^-1 K^-1 * 2000 g * 80 K = 143840 J = 143.84 kJ