一、单选题 第2章 热化学1、在下列反应中,Qp=Qv的反应为( )(A)CaCO3(s) CaO(s)+CO2(g) (B)N2(g)+3H2(g) 2NH3(g)(C)C(s)+O2(g) CO2(g) (D)2H2(g)+O2(g) 2H2O(l)2、下列各反应的(298)值中,恰为化合物标准摩尔生成焓的是( )(A)2H(g)+ O2(g)H2O(l) (B)2H2(g)+O2(g)2H2O(l)(C)N2(g)+3H2(g)2NH3(g) (D)N2(g) +H2(g)NH3(g)3、由下列数据确定CH4(g)的为( )C(石墨)+O2(g)=CO2(g) =-393.5kJmol1H2(g)+ O2(g)=H2O(l) =-285.8kJmol1CH4(g)+2O2(g)=CO2(g)+2H2O (l) =-890.3kJmol1(A)211 kJmol1; (B)-74.8kJmol1;(C)890.3 kJmol1; (D)缺条件,无法算。4、已知:(1)C(s)+O2(g)CO(