A bar of copper is heated at atmospheric pressure

PHYSICS · Subjective · CBSE · Physics · Thermodynamics · Thermodynamics

Problem

1.0\text{ kg}

bar of copper is heated at atmospheric pressure

(1.01\times10^5\text{ N/m}^2)

. If its temperature increases from

20^\circ\text{C}

50^\circ\text{C}

, calculate the change in its internal energy.

\alpha=7.0\times10^{-6}\,/{}^\circ\text{C}

\rho=8.92\times10^3\text{ kg/m}^3

, and

c=387\text{ J/(kg}\cdot{}^\circ\text{C)}