Pressure Laws Flashcards

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1
Q

As the volume of a gas increases, what happens to the pressure ?

A

the pressure will decrease
- the particles now have more space to move
- this means less collisions with the walls of the container and less internal energy
- therefore less pressure on walls of container

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2
Q

If the volume of a gas decreases and the temperature is increased what happens to the pressure ?

A
  • volume decreased means less space for the particles to move
  • this means more collisions with walls of container
  • increasing temperature increases kinetic energy of particles and therefore internal energy
  • leads to more forceful and frequent collisions
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3
Q

What is the formula for constant ?

A

pV = constant

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4
Q

A gas has a volume of 2 metres cubed and a pressure of 400,000 Pa. The volume is increased to 6 metres cubed. What is the pressure ?

A

2 * 400, 000 = 6 * p
800, 000 = 6 * p
p = 133, 333 Pa

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5
Q

Why does the temperature of a bicycle pump increase after a short period of time ?

A
  • This is because when we press down on the pump, we do work.
  • This means that energy is transferred to the gas particles, in the form of internal energy
  • internal energy includes kinetic AND potential energy
  • as kinetic energy increases, so does the temperature as there are more collisions talking place
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