Question

300 calories of heat is supplied to raise the temperature of 50 gm of air from 20°C to 30°C without any change in its volume. Change in internal energy per gram of air is

(a) zero

(b) 0.6 calories

(c) 1.2 calories

(d) 6.0 calories

Answer 1

Correct option: (d) 6.0 calories

Explanation:

∆Q = MCVdT

Change in internal energy in any thermodynamics process. dU = MCVdT

= 1 × 3/5 × 10 = 6 cal