The water-gas shift reaction
is used industrially to produce hydrogen. The reaction enthalpy is
To increase the equilibrium yield of hydrogen would you use high or low temperature?
Given water-gas shift reaction:
Now, as per Le Chatlier's principle, for exothermic reaction, when the temperature is increased then the equilibrium shifts towards the left
Therefore, products will get less formed and the reaction is thermodynamically favored at low temperatures and kinetically favored at high temperatures.
Hence, at low temperature, the equilibrium yield of hydrogen gas will be more.
At low temperature, the equilibrium yield of hydrogen gas will be more.
For the reaction:
As the reaction is exothermic
We would use low temperature. For an exothermic reaction such as this, decreasing temperature increases the value of K and the amount of products at equilibrium.
Let's consider the following reaction:
When a system at equilibrium is disturbed, the response of the system is explained by Le Chatelier's Principle: If a system at equilibrium suffers a perturbation (in temperature, pressure, concentration), the system will shift its equilibrium position to counteract such perturbation.
In this case, we have an exothermic reaction
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