已知1g火箭燃料肼(N2H4)气体燃烧生成N2和H2O(g)时,放出16.7kJ的热量,则该反应的热化学方程式正确的是( )A.N2H4+O2=N2+2H2O△H=-534.4kJ/molB.N2H4(g)+O2(g)=N2(g)+2H2O(g)△H=-534.4kJ/molC.N2H4(g)+O2(g)=N2(g)+2H2O(g)△H=+534.4kJ/molD. 1 2N2H4(g)+ 1 2O2(g)= 1 2N2(...