In a certain experiment, 0.7000 mol of hydrogen gas reacted with 0.7000 mol of solid iodine at a constant 1 atm pressure, producing 1.4000 mol of solid hydrogen iodide and absorbing 36.9 kJ of heat in the process. Which of the following thermochemical equations correctly describes this experiment?
a. H2(g) + I2(s) → 2HI(s); ΔH° = -52.72 kJ
b. H2(g) + I2(s) → 2HI(s); ΔH° = 36.9 kJ
c. H2(g) + I2(s) → 2HI(s); ΔH° = -36.9 kJ
d. H2(g) + I2(s) → 2HI(s); ΔH° = 73.8 kJ
e. H2(g) + I2(s) → 2HI(s); ΔH° = 52.72 kJ