Changing Volume through Temperature

I. Objective:  To determine how changing the temperature of a gas affects the volume of the gas, while keeping the gas at a constant pressure.

II. Hypothesis: As the temperature of the gas increases, the gas’ volume will also increase at a constant rate and when the temperature of the gas decreases, the gas’ volume will also decrease at a constant rate.

III. Methodology: 

Research Design: Experimental Research. In this kind of research, the researcher will conduct several experiments and observations to answer the questions in the statement of the problem.

Variables: 
1.1. Constant Variable/s: Pressure of the Gas
1.2. Independent Variable/s: Temperature of the Gas
1.3. Dependent Variable/s: Volume of the Gas

Materials: 
2.1. Virtual Bunsen burner
2.2. Virtual tube
2.3. Virtual sliding plug
2.4. Virtual thermometer

Method
Preliminary Procedures:
3.1. Write down the variables
3.2. Write down predictions.

Experimental Procedures:
4.1. To select a temperature, click on temperature scrollbar and drag it to a different temperature.
4.2. The gas will be heated or cooled, and, after any volume changes, record the data in the data table by clicking on the Record button.
4.3. After at least sampling 6 temperatures, proceed to the analysis and graphing section.

IV. Data:

	Temperature (K)	Volume (L)	Pressure	V/T
1	25	16.38	5.13 mm Hg	0.66
2	54	35.38	5.13 mm Hg	0.66
3	83	54.38	5.13 mm Hg	0.66
4	105	68.79	5.13 mm Hg	0.66
5	126	82.55	5.13 mm Hg	0.66
6	147	96.31	5.13 mm Hg	0.66
7	167	109.41	5.13 mm Hg	0.66
8	197	129.07	5.13 mm Hg	0.66

V. Analysis Question:

1. What is the independent variable? The independent variable for this experiment is the temperature of the gas.

2. What is the dependent variable? The dependent variable for this experiment is the volume of the gas.

3. How did your hypothesis match the data? Were you able to figure out what was going to happen?

My hypothesis matched the data accurately. In the data, as the temperature of the gas increased so did the gas’ volume. Yes, I was able to find out what was going to happen. 

4. What happened when the temperature was lowered? What happened when the temperature was raised? In this experiment, what is the relationship between the temperature of gas and the volume of gas?

When the temperature of the gas was lowered the volume of the gas also decreased. On the other hand, when the temperature of the gas was raised the volume of the gas also increased. In this experiment, the temperature of the gas and the volume of the gas had a direct relationship.

 5. What may have caused for the balloon to decrease in volume?

All gases are made up of molecules or atoms, also known as particles. Particles are always in motion, either zipping around or vibrating in place. The hotter a gas gets, the faster the particles move. Therefore since the balloon was then dragged into a cold environment, the temperature decreased thus making the particles move slower. Because of this, the pressure exerted by the gas on the gas’ surroundings decrease, creating a decrease in the volume of the gas.

V. Conclusion:

I therefore conclude that the temperature of the gas and volume of the gas are proportional to each other.

VI. References:

Methodology.  http://sunshine.chpc.utah.edu/Labs/GasParticles/. Retrieved July 17, 2015. 

Investigating the Effect of Temperature on the Volume of a Gas.  http://www.123HelpMe.com/view.asp?id=150185. Retrieved July 17, 2015.

Graph: Volume and Temperature. http://www.engineerstudent.co.uk/Images/volume_vs_temperature.png. Retrieved July 17, 2015.

Why Hotdogs expand. http://www.exploratorium.edu/cooking/icooks/03-03-03.html. Retrieved July 17, 2015.