The Reaction of Iron with Hydrochloric Acid Is Represented by the Following

Multiple Choice

The reaction of iron with hydrochloric acid is represented by the following thermochemical equation.
Fe(s) + 2HCl(aq) → FeCl₂(aq) + H₂(g) ; ΔH° = -87.9 kJ
If,in a particular experiment,1.56 kJ of heat was released at constant pressure,what volume of H₂(g) ,measured at STP,was produced? (R = 0.0821 L • atm/(K • mol) )

A) 1.38 × 10³ L
B) 0.434 L
C) 22.4 L
D) 1.26 × 10³ L
E) 0.397 L