Question

∆H for an endothermic process is __________ while ∆H for an exothermic process is __________.

A) zero, positive
B) zero, negative
C) negative, positive
D) positive, negative

Answer 1

∆H for an endothermic process is positive while ∆H for an exothermic process is negative.

Ans: D) positive, negative

What is Enthalpy?

∆H is the change in enthalpy within a system. Enthalpy is the sum of the internal energy within that system.

Equation

H = E + PV = Change in internal energy + Pressure * Volume

Step-by-step explanation

In endothermic processes, the amount of energy within the system increases and therefore ∆H increases. In exothermic processes, the amount of energy within the system decreases and therefore ∆H decreases. The best way to remember this is exo is energy exiting the system.