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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermodynamics Laws & Specific Heats of GasesHard2 minQB

PhysicsHardmultiple choice

A thermally insulated cylinder is divided into two equal parts by a frictionless piston of area $S$ . Part $A$ holds an ideal gas, part $B$ is a vacuum containing a spring of force constant $k$ attached to the piston. The spring is unstretched at first. The gas expands and compresses the spring by $x_{0}$ . Then:

Options:(select one or more)

Answer:

A, B, C

Solution:

Force balance: $PS = k x_{0}$ . The gas work is stored in the spring. $Q = 0$ so $U$ falls by $\frac{1}{2} k x_{0}^{2}$ and $T$ falls. A, B, C.

Subject:PhysicsTopic:Heat & ThermoSubtopic:Thermodynamics Laws & Specific Heats of Gases

⏱ 2mℹ️ Source: QB

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