Lab 20 : Physical Characteristics of Gases

Gas Law Animations

 

Purpose: for students to discover the relationship between variables in gas samples: amount (mass), volume, pressure, speed, and temperature

 

Using the class website, find the links to the correct animations on the “Lessons” page. Using the directions below for use of each animation, determine the relationship between the requested variables. Record your observations and data on the page provided.

 

 

  1. Temperature and Pressure (constant volume and amount)- Site A
    1. Click on the Experiment tab and then Run Experiment.
    2. Drag the blue square to the left of T (K) to various temperatures.
    3. As you do this, click on Record for data you wish to keep.
    4. Once you have created ten points, click on Graph Data.
    5. Record your information.

 

  1. Pressure and Volume (constant temperature and amount)- Site B
    1. Drag the plunger to change the volume of the gas (in mL).
    2. The chart will display the pressure for that volume of gas.
    3. When you have ten points with varying volumes, press “Graph”.
    4. Record your information.

 

  1. Amount (mass) and Volume (constant pressure and temperature)- Site C
    1. In the box on the left, freeze one of the constant variables; then choose the second to freeze.
    2. Choose “Effect of Changing Mass on Volume”.
    3. Observe the movement.
    4. Record your information.
    5. Choose “New Case” from left.

 

  1. Amount (mass) and Temperature (constant volume and pressure)- Site C
    1. In the box on the left, freeze one of the constant variables; then choose the second to freeze.
    2. Choose “Effect of Changing Mass on Temperature”.
    3. Observe the movement.
    4. Record your information.
    5. Choose “New Case” from left.

 

  1. Volume and Temperature (constant pressure and mass)- Site C
    1. In the box on the left, freeze one of the constant variables; then choose the second to freeze.
    2. Choose “Effect of Changing Temperature on Volume”.
    3. Observe the movement.
    4. Record your information.
    5. Choose “New Case” from left.

 

  1. Amount (mass) and Pressure (constant volume and temperature)- Site C
    1. In the box on the left, freeze one of the constant variables; then choose the second to freeze.
    2. Choose “Effect of Changing Mass on Pressure”.
    3. Observe the movement.
    4. Record your information.

  1. Speed (velocity) and Temperature- Site D
    1. Click on Heater.
    2. Observe the movement.
    3. Record your information.

 

 

Site A: http://media.pearsoncmg.com/bc/bc_0media_chem/chem_sim/kmt/KMT.php

 

Site B: http://introchem.chem.okstate.edu/DCICLA/boyles_law_graph.html

 

Site C: http://www.grc.nasa.gov/WWW/K-12/airplane/Animation/frglab2.html

 

Site D: http://www.falstad.com/gas/

 

Name_________________________________________ Period___ Date__________

Fill in the chart below with your observations and collected data. Under “Change”, record what you changed and how it affected the other variable. For example: Increased volume, decreased pressure. Under “Proportionality”, record whether the two variables are directly or inversely proportional. Under “Graph”, sketch the shape of the graph created by these two variables (you do not need to add numbers).

 

 

Variables

Change

Proportionality

Graph

1

Temperature and Pressure

 

 

 

2

Pressure and Volume

 

 

 

3

Amount and Volume

 

 

 

4

Amount and Temperature

 

 

 

5

Volume and Temperature

 

 

 

6

Amount and Pressure

 

 

 

7

Speed and Temperature