Lesson 8

• Nask
• Middelbare school
• havo, vwo
• Leerjaar 2

Pressure in gasses

This lesson

• Pressure in gasses
  
• Worksheet pressure
  
• Working independently
  

Learning goals

• Be able to calculate pressure, force and area in hydraulic systems.

• Explain the relationship between pressure, volume and temperature.

Recap

What do we know about this system?

• Fluids are incompressible

P​1​​=P​2​​

1

2

​A​1​​​​F​1​​​​=​A​2​​​​F​2​​​​

P​1​​=P​2​​

​A​1​​​​F​1​​​​=​A​2​​​​F​2​​​​

Rearranging the formula!

1

2

Write out in words what each symbol stands for

F​1​​⋅A​2​​=A​1​​⋅F​2​​

0.01 m2

0.4 m2

20 N

1

2

Pressure in gasses

Phet

Directly proportional

Inversely proportional

Directly proportional

Inversely proportional

Directly proportional

Inversely proportional

The homework

• How can you increase gas in pressure?
  
• What happens to gravity when you go up?
  
• Why does atmospheric pressure decrease with height?
  

Atmospheric pressure

§ 8.6 The relationship between

Pressure, volume and temperature

(in a gas)

The relationship between 

pressure, volume and temperature

Question 1) Based on your current knowledge about pressure in gasses, what causes a gas to apply pressure to its surroundings?

Question 2) What is the relationship between gas pressure and volume based on this model? What do we call this type of relationship? (For the last question, use paragraph 8.5)

Question 3) What is the relationship between gas pressure and temperature based on this model? What do we call this type of relationship? (For the last question, use paragraph 8.5)

Question 4) What is the formula for the ideal gas law?

Question 5) What do all the symbols in this formula mean?

Question 6)What does this formula tell us about the relationship between gas, volume and temperature?

Question 7) Does the relationship in this formula correspond with your answers to question 2 and 3?

The ideal gas law

P⋅V=n⋅R⋅T

The relationship between

• Volume
  
• Temprature
  
• Pressure
  

(in a gas)