Question

When a system absorbs 8 kJ of heat and does 2.2 kJ of work on surrounding, calculate the internal energy change.

Options

• 5.8 kJ

• 10.8 kJ

• - 10.2 kJ

• 8.0 kJ

Answer 1

5.8 kJ

Explanation:

Q = + 8 kJ, W = - 2.2 kJ

∴ ΔU = Q + W = 8 - 2.2 = 5.8 kJ