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Question
A cylinder with a tap contains a fixed mass of gas X. The gas is contained by a piston which can move freely towards or away from the tap. When the tap is opened, the piston moves slightly to the right, towards the tap.
What can be deducted about the pressure of gas X?
before opening tap after opening tap A less than atmospheric pressure more than atmospheric pressure B same as atmospheric pressure more than atmospheric pressure C more than atmospheric pressure less than atmospheric pressure D more than atmospheric pressure same as atmospheric pressure
A cylinder with a tap contains a fixed mass of gas X. The gas is contained by a piston which can move freely towards or away from the tap. When the tap is opened, the piston moves slightly to the right, towards the tap.
What can be deducted about the pressure of gas X?
| before opening tap | after opening tap | |
| A | less than atmospheric pressure | more than atmospheric pressure |
| B | same as atmospheric pressure | more than atmospheric pressure |
| C | more than atmospheric pressure | less than atmospheric pressure |
| D | more than atmospheric pressure | same as atmospheric pressure |
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Solution
The correct option is D D
The gas is contained by a piston which can move freely towards or away
from the tap because there is a more than atmospheric pressure inside the cylinder when a tap is closed.
And When
the tap is opened, the piston moves slightly to the right, towards the
tap because the pressure inside the cylinder is the same as atmospheric pressure.
The gas is contained by a piston which can move freely towards or away from the tap because there is a more than atmospheric pressure inside the cylinder when a tap is closed.
And When
the tap is opened, the piston moves slightly to the right, towards the
tap because the pressure inside the cylinder is the same as atmospheric pressure.
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