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PhysicsHeat & ThermoKTGMedium2 minPYQ_2020

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Consider a mixture of $n$ moles of helium gas and $2 n$ moles of oxygen gas (molecules taken to be rigid) as an ideal gas. Its $\frac{C_{P}}{C_{V}}$ value will be:

Options:

Answer:

A

Solution:

$γ$ _mix $= \frac{n_{1} c_{p_{1}} + n_{2} c_{p_{2}}}{n_{1} c_{v_{1}} + n_{2} c_{v_{2}}}$
$= \frac{n (\frac{5}{2} R) + 2 n (\frac{7}{2} R)}{n (\frac{3}{2} R) + 2 n (\frac{5}{2} R)}$
$= \frac{5 + 14}{3 + 10} = \frac{19}{13}$

Stream:JEESubject:PhysicsTopic:Heat & ThermoSubtopic:KTG

⏱ 2mℹ️ Source: PYQ_2020

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