1.
下列各组热化学方程式中,化学反应的ΔH前者大于后者的有
①H2(g)+F2(g)=2HF(g) ΔH1 H2(g)+Cl2(g)=2HCl(g) ΔH2
②C8H8(l)+O2(g)=8CO2(g)+9H2O(g) ΔH3 C8H8(g)+O2(g)=8CO2(g)+9H2O(l) ΔH4
③2N2(g)+6H2(g)4NH3(g) ΔH5 N2(g)+3H2(g)2NH3(g) ΔH6
④CaCO3(s)=CaO(s)+CO2(g) ΔH7 CaO(s)+H2O(l)=Ca(OH)2(s) ΔH8
⑤NaOH(aq)+CH3COOH(aq)=CH3COONa(aq)+H2O(l) ΔH9 HCl(aq)+NaOH(aq)=NaCl(aq)+H2O(l) ΔH10