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Consider this reaction:CO(g) + 2H2(g) ⇌ CH3OH(g); ∆rH = -92 kJ mol-1Explain the influence of the following on the basis of Le Chatelier’s principle.1. Decrease in pressure.2. Increase in temperature.3. Increase in the partial pressure of hydrogen. |
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Answer» 1. On decreasing pressure the reaction shifts in the direction in which there is increase in the number of moles. Thus, the rate of backward reaction increases on decreasing pressure. 2. On increasing temperature, the rate of endothermic reaction increases. Here, backward reaction is endothermic. Hence, on increasing temperature the rate of backward reaction increases. 3. Hydrogen, being a reactant increase in its partial pressure increases the rate of forward reaction. |
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