Name: ______Period: ______Date:______

Lab 6: Bouncing off the Walls

Directions: Open the “Gas Laws Simulation” link on our class webpage. You will be collecting data using this tool. You will manipulate the assigned variables, record the results, graph the results and draw conclusions.

Part 1: DATA COLLECTION

Pressure and Temperature: On the simulation, pump the bike pump ONCE to add gas molecules to the box. In this part, you will be changing the temperature using the controls underneath the box and recording the change in pressure. Use as wide a range of temperature values as possible. Complete questions 1-3 before beginning the simulation.

  1. What do you predict is the relationship between pressure and temperature?

As pressure INCREASES/ DECREASES temperature INCREASES/DECREASES

  1. What is the independent variable?3. What is the dependent variable?

Temperature (K)
Pressure (atm)
  1. Data

Pressure and Volume: Reset the simulation. Use the arrows next to Heavy Species to increase the numbers of particles in the chamber to 50. In this part, you will be changing the volumeby sliding the little man back and forth and recording the change in pressure. Use the ruler to record the length of the chamber (nm) as a measure of volume. Complete questions 1-3 before beginning the simulation.

  1. What do you predict is the relationship between pressure and volume?

As volume INCREASES/ DECREASES pressure INCREASES/DECREASES.

  1. What is the independent variable?3. What is the dependent variable?

Chamber length (nm)
Pressure (atm)

Data

Volume and Temperature

Reset the simulation. . Use the arrows next to Heavy Species to increase the numbers of particles in the chamber to 50. In this part, you will be changing the volume by sliding the little man back and forth and recording the change in temperature. Complete questions 1-3 before beginning the simulation.

  1. What do you predict is the relationship between volume and temperature?

As volume ______, temperature ______.

  1. What is the independent variable?3. What is the dependent variable?

Chamber length (nm)
Temperature (K)
  1. Data

Number of Particles and Pressure: Reset the simulation. Pump the bike pump to add gas molecules to the box. In this part, you will be changing the number of particles by pumping the bike pump and recording the change in pressure. Complete questions 1-3 before beginning the simulation.

  1. What do you predict is the relationship between pressure and number of particles?

As the number of particles ______, pressure ______.

  1. What is the independent variable?3. What is the dependent variable?

Number of Particles
Pressure (atm)
  1. Data

Part 2: Graphing

Combine your data with that of 1 other student and enter in and Excel spreadsheet. Create FOUR graphs. Each graph MUST have a TITLE and AXIS LABELS. Include UNITS with the axis labels. Your axis must be to scale. Print all 4 graphs on one page!! Tape Graphs into your lab NB.

Pressure and Temperature: X AXIS = Temperature; Y AXIS = Pressure

Pressure and Volume: X AXIS = Pressure; Y AXIS = Volume

Volume and Temperature: X AXIS = Temperature; Y AXIS = Volume

Number of Particles and Pressure: X AXIS = Number of Particles; Y AXIS = Pressure

Part 3: Conclusions

In your lab NB for each graph:

  1. Describe the trend of the graph. (What does the graph look like?) Discuss what is happening to both variables in your answers.
  2. Describe the relationship shown in each graph.

a. “As _____ increases, ______.....”

b. The relationship between ______and ______is a (direct; inverse) relationship.

  1. Describe what is happening to particle motion and that explains each relationship.
  2. Describe 2 examples in real life where this phenomena is observed.