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12 July, 18:48

What would cause the equilibrium to shift left in this reaction?

CO + 3H2 ⇌ CH4 + H2O

A. adding heat to the product mixture

B. a faster rate of forward reaction

C. increased collisions between CO and H2

D. the escape of water from the mixture

E. placing the mixture in a cold water bath

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  1. 12 July, 18:53
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    Answer is: A. adding heat to the product mixture.

    Balanced chemical reaction:

    CO (g) + 3H₂ (g) ⇄ CH₄ (g) + H₂O (g); ΔH = - 206.1 kJ.

    This reaction is exothermic, which means that heat is released.

    According to Le Chatelier's principle when the reaction is exothermic heat is included as a product and when the temperature increased, the heat of the system increase, so the system consume some of that heat by shifting the equilibrium to the left.
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