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The water-gas shift reaction co(g)+h2o(g)⇌co2(g)+h2(g) is used industrially to produce hydrogen. the reaction enthalpy is δh∘=−41kj.to increase the equilibrium yield of hydrogen would you use high or low temperature?

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shinmin
We can't expand the equilibrium yield of hydrogen by controlling the weight of this response. This is a reversible response in equilibrium. You have 2 mol or 2 volumes of reactants and 2 mol or 2 volumes of item. For this situation weight has no impact on the balance or the yield of H2.

Answer:

Equilibrium yield of hydrogen will increase at lower temperature.

Explanation:

  • Change in standard enthalpy change ([tex]\Delta H^{0}[/tex]) for water-gas shift reaction is negative.
  • That means the given reaction is exothermic. So heat is produced in formation of [tex]H_{2}[/tex]
  • Hence decrease in temperature would lead to shift of equilibrium towards forward direction i.e. formation of [tex]CO_{2}[/tex] and [tex]H_{2}[/tex] to satisfy Le-chatelier principle.
  • So, equilibrium yield of hydrogen will increase at lower temperature.

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