已知HCl(g)、NH3(g)和NH4Cl(s)的ΔfHm〇分別為-92.3kJ/mol、-46.1kJ/mol和-314.4kJ/mol,且有:
HCl(g)=HCl(aq)ΔrHm,1〇=-72.3kJ/mol
NH3(g)=NH3(aq)ΔrHm,2〇=-35.2kJ/mol
HCl(aq)+NH3(aq)=NH4Cl(aq)ΔrHm,3〇=-60.2kJ/mol
求:(1)2.0molHCl(g)和2.0molNH3(g)反應(yīng)生成2.0molNH4Cl(s)放出的熱量;
(2)1.0molHCl(g)和1.0molNH3(g)同時溶于水的熱效應(yīng);
(3)NH4Cl(aq)的標(biāo)準(zhǔn)摩爾生成焓;
(4)1.0mol的NH4Cl(s)溶解于水中生成NH4Cl(aq)的熱效應(yīng),并說明該過程為吸熱還是放熱。