7. IE • The temperatures of a lead block and a copper block, both with a mass of 1.0 kg and at 20 °C, are to be raised to 100 °C.

(a) The copper will require

(1) more heat, (2) the same heat, (3) less heat than the lead. Why?

(b) Calculate the difference between the heat required for the two blocks to prove your answer to part (a).