化学反应N2+3H2= 2NH3的能量变化如下图所示,该反应的热化学方程式是
A.N2(g)+3H2(g)=2NH3 (l)△H=2(a—b—c)kJ·mol-1 |
B.N2(g)+3H2(g)=2NH3(g) △H=2(b—a)kJ·mol-1 |
C.1/2N2(g)+3/2H2(g)=NH3(l) △H=(b+c—a)kJ·mol-1: |
D.1/2N2(g)+3/2H2(g)=NH3(g) △H=(a+b)kJ·mol-1 |
化学反应N2+3H2= 2NH3的能量变化如下图所示,该反应的热化学方程式是
A.N2(g)+3H2(g)=2NH3 (l)△H=2(a—b—c)kJ·mol-1 |
B.N2(g)+3H2(g)=2NH3(g) △H=2(b—a)kJ·mol-1 |
C.1/2N2(g)+3/2H2(g)=NH3(l) △H=(b+c—a)kJ·mol-1: |
D.1/2N2(g)+3/2H2(g)=NH3(g) △H=(a+b)kJ·mol-1 |