Question

100 g of water is heated from 30°C to 50°C. Ignoring the slight expansion of the water, the change in its internal energy is (specific heat of water is 4184 J/kg/K)

(a) 8.4 kJ

(b) 84 kJ 

(c) 2.1 kJ

(d) 4.2 kJ

Answer 1

Correct Option (a) 8.4 kJ

Explanation:

As work done = 0