A pot of water is heated with 10 J of energy at constant pressure. What is the enthalpy change ($\Delta$H) for this process?

Question

Quizplus · Accepted Answer

Enthalpy is defined as the heat absorbed or released by a system at constant pressure. In this case, the water is heated with 10 J of energy at constant pressure, so the enthalpy change (ΔH) is also 10 J. Since the question is asking for the sign of ΔH, we see that energy is added to the system, so the sign is positive. Therefore, the correct choice is (C) +10 J.

A Pot of Water Is Heated with 10 J of Energy