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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoFirst lawMedium2 minQB

PhysicsMediumnumerical

A diatomic gas is undergoing a process such that $9 dQ = 14 dW$ where dQ is heat absorbed by gas and dw is work done by gas. Find x if its molar heat capacity is xR.

Answer:

7.00

Solution:

$d Q = \frac{14}{9} d w$

$d Q = d U + d w$

$d Q = d U + \frac{9}{14} d Q$

$\frac{5}{14} d Q = d U$

$d Q = \frac{14}{5} \times \frac{5}{2} n R d T$

$\frac{d Q}{n d T} = 7 R$

So, $x = 7$

Stream:JEESubject:PhysicsTopic:Heat & ThermoSubtopic:First law

⏱ 2mℹ️ Source: QB

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