Visit the PhET Ideal Gas simulator: https://phet.colorado.edu/sims/html/gas-properties/latest/gas-properties_en.html

1) Choose settings temperatures 300K, number of heavy particles=200, width=10.0 nm as shown below:

Once the molecules are in equilibrium (fixed pressure), record the pressure in the table below.

2) Do the same while changing the temperature by moving the dial towards ‘heat’ on the bucket.

Temperature (K) | Pressure (atm)
300 K | 23.3
500 K |
700 K |
900 K |
1100 K |

3) Plot a graph of temperature vs pressure and report the slope

4) Now keep the temperature fixed at 300 K, and change the Volume as according to the table:

Length (nm) | Pressure (atm)
10.0 | 23.3
11.0 |
12.0 |
13.0 |
14.0 |

5) Plot a graph of length vs pressure and report the slope

6) Keep temperature 300K, length 10.0 nm, and change number of molecules as below:

Number | Pressure (atm)
200 | 23.3
250 |
300 |
350 |
400 |

7) Plot a graph of number vs pressure and report the slope

8) Plot a graph of slopes

Graph type | Slope value and units
Temperature vs Pressure |
Length vs pressure |
Number vs pressure |

9) Discuss the slope values in the context of the ideal gas law. What decides whether the slope is positive or negative?