Previous Year NEET Question- Thermodynamics L-10

Question: A sample of 0.1 g of water at 100°C and normal pressure (1.013 × 105 N m–2) requires 54 cal of heat energy to convert to steam at 100°C. If the volume of the steam produced is 167.1 cc, the change in internal energy of the sample, is#

A) 104.3 J

B) 208.7 J

C) 42.2 J

D) 84.5 J

Answer: 208.7 J#