Question

Consider the following chemical reaction which produces water from its constituent elements:

2 H2 (g) + O2 (g) → 2 H2O (l) ΔH = -571.6 kJ mol-1

If hydrogen and oxygen were mixed and allowed to react under constant pressure conditions, which of the following statements must be true?

Select as many answers as applicable

Select one or more:
a. The temperature of the surroundings would increase
b. This is an endothermic reaction
c. The temperature of the surroundings would decrease
d. ΔH = ΔU
e. ΔH = q

Answer 1

a. The temperature of the surroundings would increase 

e. ΔH = q