Chemistry - Thermochemistry Question with Solution | TestHub

ChemistryThermochemistryEnthalpy of ReactionEasy2 minPYQ_2003

ChemistryEasysingle choice

Assertion : The increase in internal energy $(Δ E)$ for the vapourization of one mole of water at $1 atm$ and $373 K$ is zero. Reason : For all isothermal processes, $Δ E = 0$ .

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Solution:

At $373 K$ or $10 0^{\circ} C$ , the water starts boiling and at this temperature the vaporization of water is an isothermal process. The internal energy change $(Δ E)$ , depend only on temperature, it follows that at constant temperature, the internal energy of the gas remains constant, i.e. $Δ E$ is zero.

Stream:AIIMSSubject:ChemistryTopic:ThermochemistrySubtopic:Enthalpy of Reaction

⏱ 2mℹ️ Source: PYQ_2003

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