Question

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?

Answer 1

Equilibrium yield of hydrogen will increase at lower temperature.

Step-by-step explanation:

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

Answer 2

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.