Physics - Heat & Thermo Question with Solution | TestHub
PhysicsHeat & ThermoThermal ExpansionMedium2 minQB
PhysicsMediumstatement
Equal masses of sugar, one as fine powder and the other as a solid lump, are dissolved completely in identical samples of water at 30°C (dissolving sugar absorbs heat). After complete dissolution, the temperature of the solution is: Treat both vessels as insulated with negligible vessel heat capacity and neglect surface energy.
Statement I: Lower for the powder.
Statement II: The same for both.
Options:
Answer:
C
Solution:
The enthalpy of solution depends only on the amount of sugar and the final state. The powder just dissolves faster. Final temperatures are equal. Statement I is false and Statement II true. Correct option: (C).
Subject:PhysicsTopic:Heat & ThermoSubtopic:Thermal Expansion
⏱ 2mℹ️ Source: QB
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