ManzaAP

Hello! I'm writing up the post-lab for a thermochem experiment, and I have to combine two net ionic equations to reach the third equation then add up the enthalpy changes. But I need a bit of help working out the equations: (a) NaOH + HCl > NaCl + H2O (b) NH4Cl +NaOH > NH3 + NaCl + H2O © NH3 + HCl > NH4Cl So I have to algebraically combine the first two equations to get to the third equation, but I'm not really sure how Thanks!