在\(m{298K}\)、\(m{100kPa}\)时，已知：\(m{2H_{2}O(g)=O_{2}(g)+2H_{2}(g)\triangle H_{1}}\) \(m{Cl_{2}(g)+H_{2}(g)=2HCl(g)\triangle H_{2}}\) \(m{2Cl_{2}(g)+2H_{2}O(g)=4HCl(g)+O_{2}(g)\triangle H_{3}}\) 则\(m{\triangle H_{3}}\)与\(m{\triangle H_{1}}\)和\(m{\triangle H_{2}}\)间的关系正确的是\(m{(}\)　　\(m{)}\) --优优班--学霸训练营

在\(\rm{298K}\)、\(\rm{100kPa}\)时，已知：\(\rm{2H_{2}O(g)=O_{2}(g)+2H_{2}(g)\triangle H_{1}}\)
\(\rm{Cl_{2}(g)+H_{2}(g)=2HCl(g)\triangle H_{2}}\)
\(\rm{2Cl_{2}(g)+2H_{2}O(g)=4HCl(g)+O_{2}(g)\triangle H_{3}}\)
则\(\rm{\triangle H_{3}}\)与\(\rm{\triangle H_{1}}\)和\(\rm{\triangle H_{2}}\)间的关系正确的是\(\rm{(}\)　　\(\rm{)}\)

A．\(\rm{\triangle H_{3}=\triangle H_{1}+2\triangle H_{2}}\)

B．\(\rm{\triangle H_{3}=\triangle H_{1}+\triangle H_{2}}\)

C．\(\rm{\triangle H_{3}=\triangle H_{1}-2\triangle H_{2}}\)

D．\(\rm{\triangle H_{3}=\triangle H_{1}-\triangle H_{2}}\)

【考点】用盖斯定律及有关计算

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难度：较易

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