在\(m{1200 ℃}\)时，天然气脱硫工艺中会发生下列反应： \(m{H_{2}S(g)+\dfrac{3}{2}O_{2}(g)=SO_{2}(g)+H_{2}O(g)}\)　\(m{ΔH_{1\;\;\;\;}2H_{2}S(g)+SO_{2}(g)=\dfrac{3}{2}S_{2}(g)+2H_{2}O(g)}\)　\(m{ΔH_{2}}\) \(m{H_{2}S(g)+\dfrac{1}{2}O_{2}(g)=S(g)+H_{2}O(g)}\)　\(m{ΔH_{3\;\;\;\;\;\;\;}2S(g)=S_{2}(g)}\)　\(m{ΔH_{4}}\) 则\(m{ΔH_{4}}\)的正确表达式为\(m{(}\)　　\(m{)}\) --优优班--学霸训练营

在\(\rm{1200 ℃}\)时，天然气脱硫工艺中会发生下列反应：

\(\rm{H_{2}S(g)+\dfrac{3}{2}O_{2}(g)=SO_{2}(g)+H_{2}O(g)}\)　\(\rm{ΔH_{1\;\;\;\;}2H_{2}S(g)+SO_{2}(g)=\dfrac{3}{2}S_{2}(g)+2H_{2}O(g)}\)　\(\rm{ΔH_{2}}\)

\(\rm{H_{2}S(g)+\dfrac{1}{2}O_{2}(g)=S(g)+H_{2}O(g)}\)　\(\rm{ΔH_{3\;\;\;\;\;\;\;}2S(g)=S_{2}(g)}\)　\(\rm{ΔH_{4}}\)

则\(\rm{ΔH_{4}}\)的正确表达式为\(\rm{(}\)　　\(\rm{)}\)

A．\(\rm{ΔH_{4}=\dfrac{2}{3}(ΔH_{1}+ΔH_{2}-3ΔH_{3})}\)

B．\(\rm{ΔH_{4}=\dfrac{2}{3}(3ΔH_{3}-ΔH_{1}-ΔH_{2})}\)

C．\(\rm{ΔH_{4}=\dfrac{3}{2}(ΔH_{1}+ΔH_{2}-3ΔH_{3})}\)

D．\(\rm{ΔH_{4}=\dfrac{3}{2}(ΔH_{1}-ΔH_{2}-3ΔH_{3})}\)

【考点】反应热和焓变,用盖斯定律及有关计算

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难度：中等

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