How much heat energy is required to raise the temperature of 5 kilograms of coal from 20°C to 220°C? A) 314 J B) 4,187,000 J C) 1,314,718 J D) 6,573 J

1000 kJ of heat energy is required.

Explanation:

Heat energy required, H = mcΔT, where m is the mass, C is specific heat and ΔT is change in temperature.

Mass of coal, m = 5 kg

Change in temperature, ΔT = 220-20 = 200°C

Specific heat of coal = 1 kJ kg⁻¹°C⁻¹

Substituting

H = mcΔT = 5 x 1 x 200 = 1000 kJ

1000 kJ of heat energy is required.