A.已知C(石墨, s)=C(金刚石, s); ΔH>0 则金刚石比石墨稳定 B.已知C(s)+O2(g)= CO2(g) ΔH1,C(s)+1/2O2(g)= CO(g) ΔH2;则ΔH1>ΔH2 C.已知2H2(g)+ O2(g)= 2H2O(g);ΔH=-483.6kJ/mol 则氢气的燃烧热为241.8kJ/mol D.已知NaOH(aq)+HCl(aq)= NaCl(aq)+H2O(l);ΔH=-57.3kJ/mol 则含20gNaOH的稀溶液与稀盐酸完全中和,放出28.65kJ的热量 |