化学反应N2＋3H2＝2NH3的能量变化如图所示，该反应的热化学方程式是
A、
N2(g)＋
H2((g)＝NH3(g)；ΔH＝(a＋b) kJ·mol－1
B、N2(g)＋3H2(g)＝2NH3(g)；ΔH＝2(b－a) kJ·mol－1
C、N2(g)＋H2(g)＝NH3(l)；ΔH＝(b＋c－a) kJ·mol－1
D、N2(g)＋3H2(g)＝2NH3(l)；ΔH＝2(a－b－c) kJ·mol－1
化学反应N2＋3H2＝2NH3的能量变化如图所示，该反应的热化学方程式是
A、N2(g)＋H2((g)＝NH3(g)；ΔH＝(a＋b) kJ·mol－1
B、N2(g)＋3H2(g)＝2NH3(g)；ΔH＝2(b－a) kJ·mol－1
C、N2(g)＋H2(g)＝NH3(l)；ΔH＝(b＋c－a) kJ·mol－1
D、N2(g)＋3H2(g)＝2NH3(l)；ΔH＝2(a－b－c) kJ·mol－1
D