[lavalady123]

a. enthalpy of solution for formation of hydrochloric acid
b. enthalpy of solution for formation of aqueous ammonia
c. neutralization of hydrochloric acid by aqueous ammonia
d. dissolution of ammonium chloride


My miserable attempt:
a. 1/2H2(g) + 1/2Cl2(g) -> HCl(g)
b.1/2N2(g) + 2H2(g) + 1/2O2? -> NH3(aq)
c. NH3(aq) + HCl(g) -. NH4Cl(s)
d. NH4Cl(s) -> NH4(aq) + CL(aq)

Never mind. I found the answer! Now I just need to figure out how to combine them..