Enthalpy change of solution as delta H in Gibbs free energy equation? Watch

HannahGrace2
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On the June 2016 0CR Chemistry A A-level paper for equilibria, energetics and elements, there is a question in which you have to complete a born haber cycle of enthalpy change of solution and you are given the lattice enthalpy. The next question you have to work out delta G for the reaction but instead of using lattice enthalpy for delta H they use enthalpy change of solution?

Thanks for any help
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AftabGujral
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In the question, they ask you to work out the enthalpy of hydration. They have given you the enthalpy of solution - the reaction they are talking about is dissolving potassium sulphate. They also give you entropy of solution, ∆S, in the next part. It's straightforward to work out the ∆G. Use T as 298K

∆G = ∆H – T∆S
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