How does increasing/decreasing temperature affect the equilibrium position of the following reaction: CuSO4.5H2O(s) ⇌ CuSO4(s) + H2O(l) ?

The endothermic and exothermic reactions should be identified. Note: if the forward reaction is endothermic, the reverse reaction will be exothermic with the same ΔH but opposite values.In this example: the forward reaction is endothermic, therefore the reverse reaction is exothermic. INCREASING THE TEMPERATURE-Increasing the temperature means there is more energy in the system (in the form of thermal energy).-Endothermic reaction is one where energy is absorbed from the surroundings.-Increasing temperature favours the endothermic reaction as the excess energy (from increasing the temperature) is absorbed, opposing the change brought about to the system. (Le Chatelier's principle)-Forward endothermic reaction is favoured meaning more of the right hand side products are made so the position of equilibrium moves to the right. DECREASING THE TEMPERATURE-Decreasing the temperature means there is less energy in the system (in the form of thermal energy).-Exothermic reacton is one where is energy is released to the surroundings. -Decreasing temperature favours the exothermic reaction in order to release more energy to the surrounding to oppose the change brought about to the system. -Reverse exothermic reaction is favoured meaning more of the left hand side reactants are made so the position of equilibrium moves to the left.

AG
Answered by Ayesha G. Chemistry tutor

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