Question

A wooden block has a mass of 20.0 kg and a specific heat of 1700 J/kg °C. Find the change in thermal energy of the block as it warms from 15.0°C to 25.0°C.

Answer 1

M = 20.0kg, the mass of the block.
c = 1700 J/(kg-°C), the specific heat
ΔT = 25 - 15 = 10 °C = 10 K, the change in temperature.

The change in thermal energy is
$Q = (20.0 \, kg)*(1700 \, \frac{J}{kg-C} )*(10 \, C) = 340 \times 10^{3} \, J$

Answer: 340 kJ (or 340,000 J)