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    ¢Ù NH3(g) + HCl(g) = NH4Cl(s) ¦¤H=£­176kJ¡¤mol¨C1

    ¢Ú NH3(g) + H2O(l) = NH3(aq)  ¦¤H=£­35.1 kJ¡¤mol¨C1

   ¢Û HCl(g) + H2O(l) = HCl(aq) ¦¤H=£­72.3 kJ¡¤mol¨C1

   ¢Ü NH4C1(s) + H2O(1) = NH4C1(aq)

   ¢Ý NH3(aq) + HCl(aq) = NH4C1(aq) ¦¤H= £­52.3 kJ¡¤mol¨C1

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