Determining the adiabatic exponent cp/cV of air after Rüchardt

VP2.5.3.1
Determining the adiabatic exponent cp/cV of air after Rüchardt
Determining the adiabatic exponent cp/cV of air after Rüchardt

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Description

The experiment P2.5.3.1 determines the adiabatic exponent of air from the oscillation period of a ball which caps and seals a gas volume in a glass tube, whereby the oscillation of the ball around the equilibrium position causes adiabatic changes in the state of the gas. In the equilibrium position, the force of gravity and the opposing force resulting from the pressure of the enclosed gas are equal. A deflection from the equilibrium position by Δx causes the pressure to change by

which returns the ball to the equilibrium position. The ball thus oscillates with the frequency

around its equilibrium position.

Components of equipment sets

1 371051 Oscillation tube with Mariotte's bottle LD
1 31327 Hand-held stop-watch, 60s/0.2s LD
1 31720  8  Precision aneroid barometer LD
1 59006  8  Plastic beaker LD
1 6753120  4  Vaseline, 100 g LD

Experiment Instructions

PDF (Experiment description) PDF (Experiment description) P2.5.3.1 Determining the adiabatic exponent cp/cV of air after Rüchardt
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