The melting point of a solid is 90°C. What is the heat required to change 2.5 kg of this solid at 30°C to a liquid?

Question

The specific heat of the solid is (390 J/(kg.K)) and its heat of fusion is (4000 J/kg).

Answer 1

This is two problems rolled into one.
q1 = heat required to raise T of solid from 40.0 C to 90.0 C.
q1 = mass x specific heat x delta T.

q2 = heat required to melt the solid once the T has reached 90.0 C.
q2 = mass x heat of fusion.

Total heat = q1 + q2.

Answer 2

The melting point of a solid is 90°C. What is the heat required to change 2.5 kg of this solid at 30°C to a liquid?
The specific heat of the solid is (390 J/(kg.K)) and its heat of fusion is (4000 J/kg).