Question

The energy diagram shown represents the chemical reaction between solid ammonium chloride in solid barium hydroxide Octa hydrate the heat for this reaction is 54.8 kj how much energy would be absorbed is 25.5 g of nh4cl

Answer 1

Ba(OH)2*8H2O + 2 NH4Cl = BaCl2 + 2NH3*H2O + 54.8 KJ
M(NH4Cl) = 53.5 g/mol
107 g(NH4Cl) = 54.8 KJ
25.5g(NH4Cl) = x KJ
x = 25.5*54.8/107 = 13.06 (KJ)