Calculate the total thermal energy

PHYSICS · Subjective · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter

Problem

Calculate the total thermal energy, in kilowatt-hours, that escapes during an

8.0\,\text{h}

winter night through a brick wall of area

20\,\text{m}^2

and thickness

0.20\,\text{m}

. The wall’s thermal conductivity is

0.12\,\text{W\,m}^{-1}\text{K}^{-1}

, and the indoor–outdoor temperature difference remains

15\,\text{K}