Chemistry - Thermodynamics - I Question with Solution | TestHub

ChemistryThermodynamics - IFirst law of ThermodynamicsEasy2 minPYQ_2020

ChemistryEasysingle choice

A gas undergoes change from state A to state B. In this process, the heat absorbed and work done by the gas is 5 J and 8 J, respectively. Now gas is brought back to A by another process during which 3 J of heat is evolved. In this reverse process of B to A:

Options:

Answer:

Solution:

$\begin{array}{l} for A to B \\ q = 5 \\ W = - 8 J, \\ Δ U_{A B} = d q + d w \Rightarrow 5 - 8 \\ Δ U_{A B} = - 3 \end{array}$

$\begin{array}{l} for B to A \\ q = 5 \\ W = - 8 J, \\ Δ U_{B A} = d q + d w \\ Δ U_{B A} = + 3 \\ d w = + 3 + 3 \\ W_{B A} = 6 J \end{array}$

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

⏱ 2mℹ️ Source: PYQ_2020

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