P vs n and P vs V Analysis

​As you go through the Quizziz:

Copy down any important information in your notebook!

​

Hint: Any information about the graphs we got from our labs = important​

Multiple Choice

When we dissolved the alka seltzer tablet, what type of particle was being released in our flask, increasing our number of particles?

• water

• carbon dioxide gas

• sodium

• vinegar

Multiple Select

After a certain point in time your graph displayed a flat line. What was happening? Why did it flatten out? Does the # of particles change at this point?

• The data was no longer recording

• The pressure remained constant

• The number of particles didn't change

• Gas was being released from the flask

Multiple Choice

As the number of gas particles increases pressure increases because

• particles collide with each other more

• particles collide with the walls of the container more

• particles speed up

• particles heat up

Multiple Choice

Does pressure vs number of particles represent a direct or indirect relationship?

• direct

• indirect

Multiple Choice

Because this is a direct relationship, as the number of gas particles increases, pressure __________.

• increases

• decreases

Multiple Choice

The relationship between number of gas particles and pressure is direct. So if I double the pressure, what happens to the number of particles?

• It doubles

• It halves

• Cannot be determined

​

Check your data. Is this true for your data?​

​

​

​If we double the pressure, the number of particles also doubles. This is because P ∝ n.  

Draw particle diagrams for

1, 2 and 3​

​

​On a whiteboard with a partner

​

Draw this in your notebook!​

​Particle diagrams of Pressurve vs n

​

​

The speed of the particles and volume of the container remained constant during this experiment​!

​

​Notice that the ONLY thing that changes from diagram 1-3 is the number of particles!

Open Ended

In our pressure vs volume experiment, how did we change the volume of the gas?

​In the pressure vs volume experiment we changed volume by moving the piston in the syringe

​

Sketch the curve for P vs V​

​

​On a whiteboard with a partner

​

Draw particle diagrams for 1, 2 and 3​

​

​On a whiteboard with a partner

​

Draw this in your notebook!​

​

​Particle diagrams of Pressure vs Volume

​

​

The number of particles and speed of the particles remained constant during this experiment!​

​

​

​Notice the ONLY thing that changes from diagram 1 to 3 is the size of the container

​

Multiple Choice

Which is a constant for your pressure vs volume experiment?

P x V = constant or P / V = constant

• P x V

• P / V

​We can say for our pressure vs volume experiment P x V = 1100 kPa ⋅ mL

​So, does this mean pressure vs volume represents a direct or indirect relationship?

Some text here about the topic of discussion

​Pressure vs Volume is an indirect relationship!

​This means P ∝ 1/V

Some text here about the topic of discussion

​As volume increases, pressure decreases

Multiple Choice

A syringe set to a volume of 8.0mL is compressed to 4.0mL. Will the pressure go up or down?

• Pressure goes up

• Pressure goes down

Multiple Choice

A syringe set to a volume of 8.0mL is expanded to 12.0mL. Will the pressure go up or down?

• Pressure goes up

• Pressure goes down