3.2 Modeling a Gas 11IB

State the equation linking force, pressure and area

• force = pressure/area

• pressure = force x area

• pressure = force / area

• area = pressure x force

Boyle's law is best stated as:

• pressure is proportional to volume

• pressure is directly proportional to volume

• pressure and volume are the same

• pressure is inversely proportional to volume

What are acceptable units of pressure? Select all answers which apply.

• newtons, N

• newton-metre² (Nm²)

• pascal (Pa)

• newton per metre² (N/m²)

What is the relationship between pressure and absolute temperature?

• pressure is directly proportional to temperature (in celsius)

• pressure is inversely proportional to temperature (in kelvin)

• pressure is proportional to temperature (in kelvin)

• pressure is directly proportional to temperature (in kelvin)

Zero kelvin (0K) is the

• lowest possible (theoretical) temperature

• same as 0F

• same as 273^oC

• quite hot, really.

A gas has a volume of 10cm³ and is at a pressure of 100kPa. The volume is doubled to 20cm³, what is its new pressure?

• 100kPa

• 50kPa

• 200kPa

• 10kPa

A gas is at room temperature of 293K and is at a pressure of 210 000 Pa. The temperature is decreased to 193K. What is the new pressure? WORK THIS OUT!

• 138,328 Pa

• 318,808 Pa

• 138,000 kPa

• 138,000 Pa

Pressure is directly proportional to absolute temperature when what is kept constant?

• volume and mass of gas

• volume and temperature

• mass of gas and pressure

• temperature and pressure

Gas Laws involve what three terms?

• Solid Liquid Gas 
• Speed Velocity Acceleration 
• Elements Compounds Mixtures 
• Pressure Temperature Volume 

When Volume increases then Pressure must...

• Increase
• Decrease