Check my answers ? only 5 multiple choice questions. i'm really confused. any and all is appreciated! will give medal! 1. which of the following is a correctly written thermochemical equation? nh4cl nh4+ + cl 2c8h18 + 25o2 16co2 + 18h2o, h = 5,471 kj/mol fe (s) + o2 (g) fe2o3 (s), h = 3,926 kj --> c3h8 (g) + 5o2 (g) 3co2 (g) + 4h2o (l), h = 2,220 kj/mol 2. how does a phase change affect a thermochemical equation? it alters the moles of reactants. --> it can affect the (delta) h value. it alters the products. it affects the balance of the equation.