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Shown below is a representation of the apparatus used by Robert Boyle to determi

ID: 692258 • Letter: S

Question

Shown below is a representation of the apparatus used by Robert Boyle to determine that gas pressure and volume are inversely related. Why does the addition of mercury to the container increase the pressure inside the J-tube?

A) Increased mercury mass heats the trapped air.

B) Increased mercury mass cools the trapped air.

C) Increased mercury mass compresses the trapped air.

D) Increased mercury mass expands the trapped air.

atmospheric pressure atmospheric pressure Hg {r added 1 bar extra P Gas Volume -30 mLl Volume -60 mL P, / V

Explanation / Answer

The addition of mercury to the container shown in the apparatus used by Robert Boyle to determine the inverse relationship between the gas pressure and volume showed an increase the pressure inside the J-tube.

This increase in pressure inside the tube is due to,

C) Increased mercury mass compresses the trapped air.

the compression of the trapped gas molecules, now exerts a pressure on the tube, which increases the overall pressure as noted down.

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