Chemistry - Thermodynamics - I Question with Solution | TestHub

ChemistryThermodynamics - IFirst law of ThermodynamicsMedium2 minPYQ_2017

ChemistryMediumsingle choice

A gas is allowed to expand in a well-insulated container against a constant external pressure of $2.5 atm$ from an initial volume of $2.50 L$ to a final volume of $4.50 L .$ The change in internal energy $ΔU$ of the gas in joules will beNEET 2017

Options:

Answer:

Solution:

$ΔU = q + w$

For adiabatic process, $q = 0$

$∴ ΔU = w$

$= - P \cdot ΔV$

$= - 2 .5 atm \times (4 .5 - 2 .5) L$

$= - 2 .5 \times 2 L - atm$

$= - 5 \times 101 .3 J$

$= - 506 .5 J$

$\approx - 505 J$

Stream:NEETSubject:ChemistryTopic:Thermodynamics - ISubtopic:First law of Thermodynamics

⏱ 2mℹ️ Source: PYQ_2017

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