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2H2(g) + CO(g)
CH3OH(g) ΔH12CH3OH (g)
CH3OCH3 (g) + H2O(g) ΔH2CO(g) + H2O (g)
CO2(g) + H2(g) ΔH3则 3H2(g) + 3CO(g)
CH3OCH3(g) + CO2(g) 的ΔH是| A．ΔH＝2ΔH1+ΔH2+ΔH3 | B．ΔH＝ΔH1+ΔH2+ΔH3 |
| C．ΔH＝ΔH1+2ΔH2+2ΔH3 | D．ΔH＝2ΔH1+ΔH2—ΔH3 |
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
