Multiple choice Which of the following are state functions? ΔH q P V 1 and 2 1, 2 and 3 1, 2 and 4 1, 3 and 4 1, 2, 3 and 4 Reveal answer Fill a bubble to check yourself D Correct answer Explanation Change in enthalpy (ΔH), pressure (P) and volume (V) are state functions.