N2(g) + 3H2(g) = 2NH3(g)中N2、H2、NH3的化学计量数分别为( )
A: 1, 3, 2
B: -1, -3, 2
C: 1, 3, -2
D: -1, -3, -2
A: 1, 3, 2
B: -1, -3, 2
C: 1, 3, -2
D: -1, -3, -2
举一反三
- 已知下列反应N2(g) + 3H2(g) = 2NH3(g) (1)1/2N2(g) + 3/2H2(g) = NH3(g) (2) 1/3N2(g) + H2(g) = 2/3NH3(g) (3)的平衡常数分别为 Kθ1 、Kθ2 、Kθ3 ,则它们的关系是 A: Kθ1=Kθ2=Kθ3 B: Kθ1 = (Kθ2)2 = (Kθ3)3 C: Kθ1 =3/2Kθ2 =2/3Kθ3 D: Kθ1 = (Kθ2)1/2 = (Kθ3)1/3
- 已知 N2(g) + 3H2(g) =2NH3(g);1/2N2(g) + 3/2H2(g) =NH3(g) 和1/3N2(g) + H2(g) =2/3NH3(g) 的平衡常数分别为K1、K2和K3,则它们的关系是: A: K1 = K2 = K3 B: K1 = (K2)2 = (K3)3 C: K1 =2K2 = 3K3 D: K1 = (K2)1/2 = (K3)1/3
- 当同一反应有两种写法时:⑴ N2 (g) + 3 H2(g) → 2 NH3 (g)ΔrGmΘ1⑵ 1/2N2(g) + 3/2H2(g) → NH3 (g)ΔrGmΘ2则ΔrGmΘ1 和ΔrGmΘ2 的关系是 A: ΔrGmΘ1 = ΔrGmΘ2 B: ΔrGmΘ1 = (ΔrGmΘ2)2 C: ΔrGmΘ1 = 1/2ΔrGmΘ2 D: ΔrGmΘ1 = 2 ΔrGmΘ2
- 若反应1/2 N2 (g) + 3/2 H2 (g) = NH3 (g)在某温度下的标准平衡常数为2,那么在该温度下氨合成反应N2 (g) + 3 H2 (g) = 2 NH3 (g) 的标准平衡常数是 A: 4 B: 2 C: 1 D: 0
- 298K时,N2(g)+3H2(g)=2NH3(g),△rHm(1)=-92.38kJ.mol-1,则1/2N2(g)+3/2H2(g)=NH3(g)△rHm(2)=()