下列说法正确的是
A.若2H2(g)+O2(g) = 2H2O(g) ΔH ="-483.6" kJ·mol-1,则H2燃烧热为241.8 kJ·mol-1 |
B.在稀溶液中:H+(aq)+OH-(aq)===H2O(l) ΔH=-57.3 kJ/mol,若将含0.6 mol H2SO4的稀硫酸与含1 mol NaOH的溶液混合,放出的热量大于57.3 kJ |
C.已知C(石墨,s)===C(金刚石,s) ΔH>0,则金刚石比石墨稳定 |
D.由BaSO4(s) + 4C(s) =" 4CO(g)" + BaS(s) △H1 = +571.2kJ•mol-1 ①BaSO4(s) + 2C(s) = 2CO2(g) + BaS(s) △H2 = +226.2kJ•mol-1 ②可得反应C(s) + CO2(g) =" 2CO(g)" 的△H = +172.5kJ•mol-1 |