CP CHEMISTRY
MR. CANOVA
LAB: VIRTUAL LAB FOR GAS LAWS
Students: Please read the following information given below, and then come to class on
your lab day with the following already prepared in your notebooks:
1) Date, 2) Partner, 3) Title, 4) Purpose, 5) Materials, 6) Safety, 7) Procedures/Observations, and
8) Data & Calculations (collect data in your notebooks)
The last 3 pages need to be printed out. These pages will be turned in. Data for this lab should be
collected in your notebooks. The questions will be due three days after performing the lab in class.
GAS LAWS STUDIED SO FAR:
Boyle’s Law states that at a constant temperature the volume of a gas is inversely proportional to the pressure.
That is, as the volume of the gas decreases, the pressure increases. The mathematical relationship is given by
PV=k (P = pressure, times V = volume = k a constant). How can you determine this constant for different
gases? How does changing the pressure exerted on a gas affect its volume? This will be found out during this
lab.
PV = k
Charles’ Law states that at a constant pressure the volume of a given quantity of gas is directly proportional to
its temperature. If the sample of gas is heated, its volume will increase. The mathematical relationship is V =
bT (V = volume and is equal to b = the proportionality constant time * T = temperature). Remember T
represents absolute temperature measured in Kelvin. Knowing the volume and the temperature, one can
calculate the proportionality constant
V = bT
Gay Lussac’s Law states that at a constant volume the pressure of a given quantity of gas is directly
proportional to its temperature. If the sample of gas is heated, its volume will increase. The mathematical
relationship is P=kT (P = pressure and is equal to k= a constant * T). Remember T represents absolute
temperature measured in Kelvin. Knowing the pressure and the temperature, one can calculate the
proportionality constant.
P= kT
PART I:
Visit http://www.glencoe.com/sites/common_assets/science/virtual_labs/PS08/PS08.html and complete the
information provided in the left hand margin of the virtual lab (COMPLETE #1 to #9). Record your
data in your lab notebooks and then answer the questions on the following page.
PART II:
Visit http://intro.chem.okstate.edu/1314F00/Laboratory/GLP.htm and experiment with the different
variables provided on the top of the page. Record your data in your lab notebooks and then answer the
questions on the following page.
1
CP CHEMISTRY
MR. CANOVA
Name______________________________________
Period_________________
Date_____________
Lab Group #_______
Lab: VIRTUAL LAB FOR GAS LAWS
QUESTIONS:
Part I: (Virtual Lab with Gas Container)
Draw a sketch of the apparatus that appeared in Virtual lab:
LABEL ALL THE PIECES AND GIVE THE CORRECT UNITS VIEWED
1. What were the units of pressure, volume, and temperature on this virtual lab?
Pressure= _________________
Volume= ________________
Temperature=__________________
2. What were the starting values for pressure, volume, and temperature on this virtual lab? (provide units)
Pressure= _________________
Volume= ________________
Temperature=__________________
3. What were the temperatures for each of the following on the hot plate?
LOW= _________________
MEDIUM= ________________
HIGH=__________________
4. Complete the data table below by filling in the missing values:
PRESSURE:
VOLUME:
25 kPa
50 kPa
600 mL
200 mL
5. According to Virtual lab, what is pressure defined as? ___________________________________________
6. What mathematical formula was given to calculate pressure? P= ___________________________________
7. According to Virtual lab, what is the common unit pressure is expressed in? _________________________
2
CP CHEMISTRY
MR. CANOVA
Name______________________________________
Period_________________
Date_____________
Lab Group #_______
Lab: VIRTUAL LAB FOR GAS LAWS
QUESTIONS:
Part II: (Virtual Gas Law Program)
A) Look at the controls at the top of the screen: P (pressure), V (volume), n (mol He), n (mol Ne), T
(temperature).
1. What are the units of pressure, volume and temperature on this virtual lab?
Pressure= _________________
Volume= ________________
Temperature=________
2. Give the initial values for each of the following=
Pressure= _____ Volume= _______ n (mol He)= ________
n (mol Ne)= ______Temperature=______
B) Increase the value of n (mol Ne) to 1.00 (or as close as possible), then click on “enable tracking,”
3. Describe what happens to the gas molecule that is being tracked in the grid on the left side.
_________________________________________________________________________________________
4. What happens when the gas particle being tracked hits another fast moving particle?
_________________________________________________________________________________________
5. What happens when the gas particle being tracked hits another slow moving particle?
_________________________________________________________________________________________
C) Click disable tracking and analyze the following relationships (The Gas Laws)
Boyle’s Law analyzes the relationship between pressure and volume. Make sure the pressure button has been
chosen for this exercise.
6. What happens to the pressure of the gas when volume is increased? _________________________
7. What happens to the volume of the gas when the pressure is increased? _________________________
8. When one goes up, the other goes down. This is known as a __________________ relationship.
Charles’s Law analyzes the relationship between volume and temperature. Make sure the volume button has
been chosen for this exercise.
9. What happens to the volume of the gas when temperature is increased? _________________________
10. What happens to the volume of the gas when temperature is decreased? _________________________
11. When one goes up, the other goes up. This is known as a __________________ relationship.
3
CP CHEMISTRY
MR. CANOVA
Name______________________________________
Period_________________
Date_____________
Lab Group #_______
Lab: VIRTUAL LAB FOR GAS LAWS
QUESTIONS:
Part II: (Virtual Gas Law Program) continued
Gay Lussac’s Law analyzes the relationship between pressure and temperature. Click on the reset button and
increase the n (mol Ne) to 1.00. Make sure the pressure button has been chosen for this exercise.
12. What happens to the pressure of the gas when temperature is increased? _________________________
13. What happens to the volume of the gas when the temperature is decreased? _________________________
14. When one goes up, the other goes up. This is known as a __________________ relationship.
D) Press reset, find the drop down menu and change from "velocities" to "relationships". Increase the n
(mol Ne) to the maximum. Analyze the relationship of Pressure vs. Volume, click "enable" to begin
analysis.
15. Analyzing the relationship between pressure and volume, increase the volume to the maximum and watch
the graph. Decrease the volume to the minimum; draw the graph of this relationship:
16. Analyzing the relationship between volume and temperature, increase the temperature to the maximum and
watch the graph. Decrease the temperature to the minimum; draw the graph of this relationship:
17. Analyzing the relationship between pressure and temperature, increase the temperature to the maximum and
watch the graph. Decrease the temperature to the minimum; draw the graph of this relationship:
18. Which of the 3 graphs is an example of an INVERSE OR INDIRECT RELATIONSHIP?
CIRCLE CHOICE(S):
#15
#16
#17
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