Question

、N2H2是一种高效清洁的火箭燃料。0.25 mol N2H2(g)完全燃烧生成氮气和气态水时，放出133.5 kJ热量。则下列热化学方程式正确的是

A．N2H2(g)+O2(g)=N2(g)+2H2O(g)；ΔH=+133.5 kJ·mol-1

B．N2H2(g)+O2(g)=N2(g)+2H2O(g)；ΔH=-133.5 kJ·mol-1

C．N2H2(g)+O2(g)=N2(g)+2H2O(g)；ΔH=+534 kJ·mol-1

D．N2H2(g)+O2(g)=N2(g)+2H2O(g)；ΔH=-534 kJ·mol-1

Answer 1