已知:

①NH₃(g)+HCl(g)==NH₄Cl(s) △H₁=-176 kJ·mol^-1

②NH₃ (g(aq) △H₂=-35.1 kJ·mol^-1

③HCl(g)HCl(aq) △H₃=-72. 3 kJ·mol^-1

④NH₃ (aq) +HCl(aq)==NH₄Cl(aq) △H₄=-52. 3 kJ·mol^-1

⑤NH₄Cl(s)NH₄Cl(aq) △H₅

则第⑤个热化学方程式中△H₅为 [ ]

A. +16.3 kJ·mol^-1

B. -16.3 kJ·mol^-1

C. +335.7 kJ·mol^-1

D. -335.7 kJ·mol^-1