Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermodynamicsMedium2 minQB

PhysicsMediumsingle choice

1500 J of heat flows out of a gas as it is compressed from point A to point B in the PV-diagram as shown. What is the number of degrees of freedom of the gas?

Options:

Answer:

Solution:

Compression A $\to$ B: $W = - \frac{1}{2} (9 + 3) atm \times 3 L \approx - 1800$ J.

$Δ U = Q - W = - 1500 + 1800 = 300$ J.

Also $Δ U = \frac{f}{2} (P_{B} V_{B} - P_{A} V_{A}) = \frac{f}{2} (18 - 15) atm-L = \frac{f}{2} \times 300$ J, so $f = 2$ .

Stream:JEESubject:PhysicsTopic:Heat & ThermoSubtopic:Thermodynamics

⏱ 2mℹ️ Source: QB

Doubts & Discussion

Loading discussions...