Question

In a particular reaction, 2 kJ of heat is released by the system and 8 kJ of work is done on the system. Determine ΔU.

Answer 1

ΔU = Q + W,

Here, Q = − 2 kJ, W = 8 kJ

∴  ΔU = − 2 + 8

∴  ΔU = 6 kJ