根据盖斯定律求反应热已知:(1)NH3(g)+HCl(g)==NH4Cl(s) 反应热=-176KJ/mol(2)NH3(g)+H2O(l)==NH3·H2O(aq) 反应热=-35.1KJ/mol(3)HCl(g)+H2O(l)==HCl(aq) 反应热=-72.3KJ/mol(4)NH3(aq)+HCl(aq)==NH4Cl(aq) 反应热=-52.3KJ/m
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![根据盖斯定律求反应热已知:(1)NH3(g)+HCl(g)==NH4Cl(s) 反应热=-176KJ/mol(2)NH3(g)+H2O(l)==NH3·H2O(aq) 反应热=-35.1KJ/mol(3)HCl(g)+H2O(l)==HCl(aq) 反应热=-72.3KJ/mol(4)NH3(aq)+HCl(aq)==NH4Cl(aq) 反应热=-52.3KJ/m](/uploads/image/z/11344817-65-7.jpg?t=%E6%A0%B9%E6%8D%AE%E7%9B%96%E6%96%AF%E5%AE%9A%E5%BE%8B%E6%B1%82%E5%8F%8D%E5%BA%94%E7%83%AD%E5%B7%B2%E7%9F%A5%EF%BC%9A%EF%BC%881%EF%BC%89NH3%28g%29%2BHCl%28g%29%3D%3DNH4Cl%28s%29+%E5%8F%8D%E5%BA%94%E7%83%AD%3D-176KJ%2Fmol%EF%BC%882%EF%BC%89NH3%28g%29%2BH2O%28l%29%3D%3DNH3%C2%B7H2O%28aq%29+%E5%8F%8D%E5%BA%94%E7%83%AD%3D-35.1KJ%2Fmol%EF%BC%883%EF%BC%89HCl%28g%29%2BH2O%28l%29%3D%3DHCl%28aq%29+%E5%8F%8D%E5%BA%94%E7%83%AD%3D-72.3KJ%2Fmol%EF%BC%884%EF%BC%89NH3%28aq%29%2BHCl%28aq%29%3D%3DNH4Cl%28aq%29+%E5%8F%8D%E5%BA%94%E7%83%AD%3D-52.3KJ%2Fm)
根据盖斯定律求反应热已知:(1)NH3(g)+HCl(g)==NH4Cl(s) 反应热=-176KJ/mol(2)NH3(g)+H2O(l)==NH3·H2O(aq) 反应热=-35.1KJ/mol(3)HCl(g)+H2O(l)==HCl(aq) 反应热=-72.3KJ/mol(4)NH3(aq)+HCl(aq)==NH4Cl(aq) 反应热=-52.3KJ/m
根据盖斯定律求反应热
已知:
(1)NH3(g)+HCl(g)==NH4Cl(s) 反应热=-176KJ/mol
(2)NH3(g)+H2O(l)==NH3·H2O(aq) 反应热=-35.1KJ/mol
(3)HCl(g)+H2O(l)==HCl(aq) 反应热=-72.3KJ/mol
(4)NH3(aq)+HCl(aq)==NH4Cl(aq) 反应热=-52.3KJ/mol
求:NH4Cl(s)+2H2O==NH4Cl(aq)的反应热
根据盖斯定律求反应热已知:(1)NH3(g)+HCl(g)==NH4Cl(s) 反应热=-176KJ/mol(2)NH3(g)+H2O(l)==NH3·H2O(aq) 反应热=-35.1KJ/mol(3)HCl(g)+H2O(l)==HCl(aq) 反应热=-72.3KJ/mol(4)NH3(aq)+HCl(aq)==NH4Cl(aq) 反应热=-52.3KJ/m
NH4Cl(s)== NH3(g)+HCl(g) 反应热=176KJ/mol 即-(1)
NH3(g)+H2O(l)==NH3·H2O(aq)反应热=-35.1KJ/mol即(2)
HCl(g)+H2O(l)==HCl(aq)反应热=-72.3KJ/mol即(3)
NH3(aq)+HCl(aq)==NH4Cl(aq) 反应热=-52.3KJ/mol即(4)
-(1)+(2)+(3)+(4)得到NH4Cl(s)+2H2O==NH4Cl(aq)
176KJ/mol-35.1KJ/mol-72.3KJ/mol-52.3KJ/mol=+16.3kJ/mol