Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoKTGEasy2 minPYQ_2015

PhysicsEasysingle choice

Using equipartition of energy, the specific heat (in $J {kg}^{- 1} K^{- 1}$ ) of Aluminium at high temperature can be estimated to be (atomic weight of Aluminium $= 27$ )

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Answer:

Solution:

Solid atom possesses $6$ degrees of freedom due to vibrations at high temperature.

$C_{v} = \frac{1}{2} f R = \frac{6 R}{2} = 3 R$ for $1 mole$
$∴$ Specific heat capacity in $J {kg}^{- 1} K^{- 1} = \frac{C_{v}}{M}$

$= \frac{3 R}{M} = \frac{3 \times 8.314}{27} \times 1000$

$\approx 925$

Stream:JEESubject:PhysicsTopic:Heat & ThermoSubtopic:KTG

⏱ 2mℹ️ Source: PYQ_2015

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