Question

A 144 kg park bench made of iron sits on the sun, its temperature increases from 25c to 35c, how many kilojoules of energy does the bench absord?

Answer 1

Mass of the iron bench = 144 kg

The iron will absorb energy from the sun and its temperature will increase from 25 degree Celsius to 35 degree Celsius

Change in the temperature = 35 - 25 = 10 degree Celsius

Specific heat capacity of the iron (c) = 460.54 J/Kg C

Heat gained by the iron bench = M × c × ΔT

Heat gained by the iron bench = 144 × 460.54 × 10

Heat absorbed = 663177.6 Joules

Hence, to raise the temperature from 25 to 35 degree Celsius, the iron bench will absorb energy from the sum = 663177.6 Joules