Question 11. One mole of an ideal gas requires 207 J heat to raise the temperature by 10 K, when heated at constant pressure. If the same gas is heated at constant volume to raise the temperature by 10K, then heat required is (a) 96.6 J (b) 124 J (c) 198.8 J (d) 215.4 J Answer
Correct option is D) At constant pressure, Q = nC p ΔT 207 = C p ×10 C p =20.7 At constant volume, W = 0 Q = U = nC v ΔT C p =C v +R C v =20.7−8.3=12.4 Q = 12.4×10 Q = 124 J
