Chemistry

Christian Rich

9 August, 18:49

If 20.00 mol of hydrogen gas completely reacted with 20.00 mol of chlorine gas

at constant pressure, releasing 3700 kJ of heat, which of the following

thermochemical equations is correct?

H2 (g) + Cl2 (g) = > 2HCl (g); AH° = - 185 kJ

H2 (8) + Cl2 (8) = > 2HCl (g); AH° = + 185 kJ

H2 (g) + Cl2 (g) = > 2HCl (g); AH° = + 370 kJ

H2 (g) + Cl2 (g) = > 2HCl (g); AH° = - 3700 kJ

H2 (g) + Cl2 (g) = > 2HCl (g); AH° = - 1850 kJ