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Chemistry - Thermodynamics - I Question with Solution | TestHub

ChemistryThermodynamics - IFirst law of ThermodynamicsEasy2 minPYQ_2020

ChemistryEasysingle 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 $Δ U$ of the gas in joules will be

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Answer:

Solution:

As q = 0 so using I law of Thermodynamics.
$Δ U = - p . Δ V$
$= - 2.5 (4.5 - 2.5) = - 5$ lit atm
$= - 5 \times 101.3 = - 506.5$ Joule
$= - 505$ J

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

⏱ 2mℹ️ Source: PYQ_2020

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