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Worksheets5th Ideal Gasses Follow up
Total questions: 10
Worksheet time: 7mins
A diver breathes air from a cylinder when he is under water.
The cylinder contains 8 litres of air at 200 times atmospheric pressure.
The air is released from the cylinder at normal atmospheric pressure.
The diver needs 16 litres of air per minute.
Calculate the maximum amount of time that the diver can breathe under water using this cylinder.
(3)
25 minutes
100 minutes
25 seconds
100 seconds
When a diver breathes out, bubbles are released.
Suggest why the bubbles expand as they rise to the surface.
Choose all that apply:
Pressure decreases as depth decreases
Pressure increases as depth decreases
p/v is constant
p x v is constant
Explain how Brownian motion provides evidence that air is made of small particles. Pick the best answer
Smaller air molecules are jostled by faster larger smoke particles providing a continuous random motion of smaller air molecules
Larger smoke particles are jostled by faster smaller air molecules providing a continuous random motion of air molecules
Larger smoke particles are jostled by faster smaller air molecules providing a continuous random motion of smoke particles
Smaller air molecules are jostled by faster larger smoke particles providing a continuous random motion of smoke particles
In a bicycle pump, when the piston handle is pulled, air moves past the flexible rubber disc into a sealed space.
When the volume of the space is 80 cm3, the air has a pressure of 1.01×105 Pa.
Calculate the pressure inside the space when the piston handle is pushed in and the volume decreases to 10 cm3.
8.08x105 kN/m2
8.08x105 Pa
1.2x104 Pa
1.2x104 kN/m2
A cylinder of compressed air used to breathe underwater.
Explain how the air causes a pressure on the inside of the cylinder.
Particles collide with each other, producing a force and pressure = force/area
Particles collide with each other, producing a pressure and pressure = force/area
Particles collide with the walls of the can, producing a force and pressure = force/area
Particles collide with the walls of the can, producing a pressure and pressure = force/area
Explain what happens to the pressure of the air inside a sealed cylinder as its temperature increases.
There is an increase in the speed. Particles collide with the walls more often with more force.
There is an increase in the kinetic energy and therefore the average speed decreases. Particles collide with the walls more often with more force.
There is an increase in the kinetic energy and therefore the average speed decreases. Particles collide with the walls less often with more force.
There is an increase in the kinetic energy and therefore the average speed increases. Particles collide with the walls more often with more force.
The gas in a cylinder has a pressure of 210 kPa at a temperature of 20 °C.
Calculate the new pressure when the temperature of the gas rises to 83 °C.
50.6 kPa
871.5 kPa
172.8 kPa
255 kPa
What happens to the pressure and volume of a cylinder of trapped air if the pump handle is pushed in
Pressure Decreases, Volume Decreases
Pressure Increases, Volume remains the same
Pressure Decreases, Volume remains the same
Pressure Increases, Volume decreases
The temperature of a gas is directly proportional to:
Average velocity and kinetic energy of the particles
Average velocity of the particles
Average kinetic energy of the particles
Neither average velocity or kinetic energy of the particles
What happens to the pressure and volume of a cylinder of trapped air if the cylinder is heated
Pressure decreases, volume decreases
Pressure increases, volume increases
Pressure decreases, volume remains the same
Pressure increases, volume remains the same
