25℃、101kPa下，4g CH₄完全燃烧生成CO₂和液态水时，放出222.5 kJ的热量，则下列热化学方程式中正确的是(     )

A．CH4(g)＋2O2(g)=CO2(g)＋2 H2O(g ) △H＝－890kJ/mol

B．CH4(g)＋2O2(g)=CO2(g)＋2 H2O(l ) △H＝＋890kJ/mol

C．CH4(g)＋O2(g)= CO2(g)＋H2O(1) △H＝－445kJ/mol

D．CH4(g)＋2O2(g)=CO2(g)＋2 H2O(l ) △H＝－890kJ