chapter 4 lesson 3 gas behavior. chapter 4 big question how does a substance change states?

Chapter 4 Lesson 3

Gas Behavior

Chapter 4 Big Question

• How does a substance change states?

Chapter 4 Objectives

How are Pressure and Temperature of a Gas Related?

• Temperature increases, pressure increases• Temperature decreases, pressure decreases• Ex: truck tires burst on hot day– Temp. is increased, so is pressure– Pressure continues to increase until tires can’t

hold any more *BOOM*

Temperature and Gas PressureWhen a gas is heated in a closed, rigid container, the particles move faster and collide more often. How would the change in pressure of the gas be shown on each pressure gauge?

How Are Volume and Temperature of a Gas Related?

• Charles’s law– Temperature increases, volume increases– Temperature decreases, volume decreases– Volume and pressure have a directly proportional

relationship (increase or decrease at the same rate)

Cooling a BalloonThe volume of a gas-filled balloon decreases as temperature

decreases and then increases as temperature increases.

Charles’s LawHow would the gas particles and piston look at the

different higher temperatures?

Charles’s Law in Action

• Soda Can

In an experiment, a gas is heated at a constant pressure. The data shown in the table are plotted on the graph.

What happens to the volume of a gas when the temperature is increased at constant pressure?

Suppose the data formed a line with a steeper slope. For the same change in temperature, how would the change in volume

compare?

How Are Pressure and Volume of a Gas Related?

• Boyle’s Law– Pressure increases, volume decreases– Pressure decreases, volume increases– Inversely proportional relationship (opposite)

Boyle’s LawAs weights are added to the top of each piston, the piston moves farther down in

the cylinder. Rank the pressure and the volume in each of the cylinders.

Graphing Boyle’s LawUse the data to make a line graph. What would be a good title for

the graph?

Boyle’s Law in Action

• https://www.youtube.com/watch?v=N5xft2fIqQU