Experimental Gas Laws Flashcards

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1
Q

What is Boyle’s Law?

A

For a fixed mass of gas at constant temperature pV = constant.

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2
Q

What is Charle’s Law?

A

For a fixed mass of gas at constant pressure V/T = constant.

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3
Q

What is the Pressure Law?

A

For a fixed mass of gas at constant volume p/T = constant.

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4
Q

Define a isothermal process.

A

An isothermal process is a change of a system, in which the temperature remains constant.

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5
Q

Define an isobaric process.

A

A process in which the pressure stays constant.

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6
Q

Explain the Boyle’s Law experiment.

A
  • The length of the air represents the volume as the tube has a constant cross-sectional area.
  • Initial reading taken of pressure using pressure gauge and volume V represented by length L.
  • Pressure changed (probably using a footpump).
  • Readings again taken of p and L (representing volume).
  • Repeated for at least seven different pressures.
  • Results could be plotted of p against 1/V and the graph will be a straight line passing through the origin
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7
Q

What happens when work is done to change the volume of a gas?

A

Energy must be transferred by heating to keep pressure constant, and work done by a gas on a piston can be given by pΔV.

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8
Q

Explain Charle’s Law Experiment.

A
  • A volume of air is trapped below the concentrated sulphuric acid.
  • The length of the air represents the volume as the capillary tube has a constant cross-sectional area.
  • Initial reading taken of temperature T and length L at room temperature.
  • Bunsen burner used to increase temperature by approximately 10 °C.
  • Bunsen removed and water stirred to obtain even temperature.
  • Readings taken of T and L.
  • Bunsen replaced under beaker.
  • Repeated for at least seven further higher temperatures.
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9
Q

Explain the Pressure Law Experiment

A
  • Initial reading taken of pressure on pressure gauge and temperature T using thermometer.
  • Heater used to increase temperature.
  • Water stirred to ensure even temperature before taking readings.
  • Readings again taken of p and T.
  • Repeated for at least seven different temperatures.
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