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10.23 g of sodium thiosulfate pentahydrate (ΔHsoln=+47.40 kJ/mol; MM = 158.108 g/mol) is dissolved in water....

10.23 g of sodium thiosulfate pentahydrate (ΔHsoln=+47.40 kJ/mol; MM = 158.108 g/mol) is dissolved in water. The mass of the water solution is 102.5 g. If the initial temperature of the water was 22.8°C, what will be the final temperature of the solution?

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1 mol No of moles of sodium thiosulfate pentahydrate = 10.23g xe - = 0.0647 mol 158.108 g Heat of solution = –15.30 kJ/mol +4

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