Question

Calculate ΔU if 2 kJ heat is released and 10 kJ of work is done on the system.

Options

• 12 kJ

• 8 kJ

• 5 kJ

• 20 kJ

Answer 1

8 kJ

Explanation:

Given, Heat released (q) = - 2 kJ

Work done (W) = 10 kJ

∴ ΔU = q + W = - 2 + 10 = 8 kJ