Question

The value of Δ U is ______ when 2 kJ of heat is released and 6 kJ of work is done on the system.

Options

• -4 kJ

• +4 kJ

• 8 kJ

• 6 kJ

Answer 1

The value of Δ U is +4 kJ when 2 kJ of heat is released and 6 kJ of work is done on the system.

Explanation:

Q = -2 kJ, W = +kJ

Δ U = Q + W

= -2 + 6

= +4 kJ