Chemistry - Thermodynamics - I Question with Solution | TestHub

ChemistryThermodynamics - IFirst law of ThermodynamicsEasy2 minPYQ_2020
ChemistryEasysingle choice

A gas absorbs 200 J of heat and expands by 500  cm 3 against a constant pressure of 2×10 5   Nm −2 . The change in internal energy of the gas will be

Options:

Answer:
C
Solution:

ΔE=q+w
Hereq=+200 J
w = −PΔV = −2 ×  10 5   Nm −2  × 500  cm 3  ×  1 m 100 cm 3
= −2 ×  10 5  × 500 ×  10 −6   Nm −2  ×  m 3
=−100 Nm=−100 J
So, ΔE=200 J−100 J
=+100 J

Stream:NTA_ABHYAS_NEETSubject:ChemistryTopic:Thermodynamics - ISubtopic:First law of Thermodynamics
⏱ 2mℹ️ Source: PYQ_2020

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