A 400 g glycerol sample has specific heat 2.43 J/(g·°C). How much heat raises it by 5 °C? Assume constant specific heat and no phase change.

A) 972 J

B) 4860 J

C) 2430 J

D) 9720 J

Answer: B

Explanation: At approximately constant specific heat, q = mcΔT. Multiply 400 g by 2.43 J/(g·°C) and 5 °C to obtain 4860 J.