Chemistry - Thermochemistry Question with Solution | TestHub
ChemistryThermochemistryEnthalpy of solution/dilution/hydrationMedium2 minQB
ChemistryMediumstatement
Statement 1: When anhydrous CuSO4 is stirred into water, the solution becomes warm.
Statement 2: Anhydrous salts that are capable of forming hydrates dissolve in water with a negative enthalpy change.
Options:
Answer:
A
Solution:
Anhydrous CuSO4 forms CuSO4·5H2O-type hydrated ions on dissolving, and the hydration enthalpy released exceeds the lattice enthalpy absorbed, so dissolution is exothermic and the solution warms (Statement 1 correct). Statement 2 states the general rule for such salts, which is exactly why CuSO4 warms the water. Ans: (a).
Stream:JEESubject:ChemistryTopic:ThermochemistrySubtopic:Enthalpy of solution/dilution/hydration
⏱ 2mℹ️ Source: QB
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