Gas Pressure Pt 2 OALH

Do Now

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Describe the relationship between temperature and pressure of a gas

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Recall Boyle’s law in words

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Describe the relationship between force, mass and acceleration of an object

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Define “resolution” on a piece of equipment

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Calculate the volume of an object that has a length of 5cm, a width of 4cm and a height of 2cm

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Calculate the volume of a cylinder that has a radius of 4cm and a height of 9cm.

Key Knowledge

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Define Boyle’s Law in words

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Define Boyle’s Law as an equation

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Explain why work done to a gas will change the temperature of a gas

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Define Boyle’s Law in words

1

Define Boyle’s Law as an equation

1

Explain why work done to a gas will change the temperature of a gas

Recall Quiz

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1)Boyle’s Law in words is…

2) Boyle’s Law as an equation is….

3) Doing work on a gas increases it’s temperature because….

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Find a, b, c, d, e and f

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1. The table below gives data for an experiment looking at how the pressure of a sample of gas changes when its volume increases (at constant temperature).

a. Determine the values in the third column of the table

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b. What do you notice about the values of p x V?

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1. Fill in the blanks:

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3. The pressure of a sample of gas in a sealed container is changed with the temperature remaining the same. Which statement is correct?
A. If pressure is doubled, the volume also doubles.
B. If pressure is halved, the volume also doubles.
C. If pressure is halved, the volume is also halved.
D. If pressure is doubled, the volume reduces to a quarter.

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4. The diagram represents the particles in a sample of air inside a sealed syringe.
The piston is now pulled out so that the gas occupies double the original volume.
a. Draw a second diagram to show the effect this has on the particles.
b. What effect does this have on the pressure of the air?

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5. A sample of gas is at atmospheric pressure (100 000 Pa) and has volume 50cm3
a. Determine the new pressure if the volume is halved.
b. Determine the new pressure if the volume is doubled.
c. Determine the new pressure if the volume is decreased to 35cm3.
d. Determine the new volume if the pressure is reduced to 78 000 Pa.

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6. Fill in the blanks:
For a fixed of gas at constant , the pressure of a gas increases as the of its container .

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7. A carbon dioxide gas cylinder contains 180cm3 of gas at a pressure of 6.3 x 106Pa.

a. Calculate the volume of the gas at atmospheric pressure, 1.0 x 105 Pa.
The cylinder valve is opened and the gas is collected at atmospheric pressure.

b. Explain why less gas would be collected than the answer to a.?
Carbon dioxide does not liquefy when put under pressure. Butane gas (used in camping gas cylinders) does liquefy.

c. Explain how the cylinders used to store carbon dioxide would be different from those used to store butane (camping gas).

Plenary

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Draw two diagrams to show how increasing the volume decreases the pressure of a gas.

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What are the two effects of doing work on a gas?

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A sealed syringe contains 10 x10-6 m3of air at 1 × 105 Pa. The plunger is pushed until the volume of trapped air is 4 x 10-6m3. If there is no change in temperature what is the new pressure of the gas?

Describe the relationship between temperature and pressure of a gas

Recall Boyle’s law in words

Describe the relationship between force, mass and acceleration of an object

Define “resolution” on a piece of equipment

Calculate the volume of an object that has a length of 5cm, a width of 4cm and a height of 2cm

Calculate the volume of a cylinder that has a radius of 4cm and a height of 9cm.

Define Boyle’s Law in words

Define Boyle’s Law as an equation

Explain why work done to a gas will change the temperature of a gas

Define Boyle’s Law in words

Define Boyle’s Law as an equation

Explain why work done to a gas will change the temperature of a gas

1)Boyle’s Law in words is…2) Boyle’s Law as an equation is….3) Doing work on a gas increases it’s temperature because….

Find a, b, c, d, e and f

1. The table below gives data for an experiment looking at how the pressure of a sample of gas changes when its volume increases (at constant temperature).a. Determine the values in the third column of the table

b. What do you notice about the values of p x V?

1. Fill in the blanks:

4. The diagram represents the particles in a sample of air inside a sealed syringe.The piston is now pulled out so that the gas occupies double the original volume.a. Draw a second diagram to show the effect this has on the particles.b. What effect does this have on the pressure of the air?

6. Fill in the blanks:For a fixed ____________________of gas at constant ____________________, the pressure of a gas increases as the ____________________ of its container ____________________.

Draw two diagrams to show how increasing the volume decreases the pressure of a gas.

What are the two effects of doing work on a gas?

A sealed syringe contains 10 x10-6 m3of air at 1 × 105 Pa. The plunger is pushed until the volume of trapped air is 4 x 10-6m3. If there is no change in temperature what is the new pressure of the gas?

1)Boyle’s Law in words is…

2) Boyle’s Law as an equation is….

3) Doing work on a gas increases it’s temperature because….

1. The table below gives data for an experiment looking at how the pressure of a sample of gas changes when its volume increases (at constant temperature).

a. Determine the values in the third column of the table

4. The diagram represents the particles in a sample of air inside a sealed syringe.
The piston is now pulled out so that the gas occupies double the original volume.
a. Draw a second diagram to show the effect this has on the particles.
b. What effect does this have on the pressure of the air?

6. Fill in the blanks:
For a fixed of gas at constant , the pressure of a gas increases as the of its container .