The Relationship Between Temperature And Pressure Of The Air In The Jolly's Bulb Experiment

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The purpose of this experiment is to determine the relationship between the temperature and pressure of air at constant volume which placed the Jolly’s bulb in water of different temperature. At the constant volume of the air in the Jolly’s bulb, the temperature and pressure of the air are measured and recorded throughout the experiment. The result shows that the pressure of the air in the Jolly’s bulb increases as the temperature rises, and the pressure decreases as the temperature decreases. After plotting the graph manually according to the data obtained from the experiment, it shows that the pressure of air is linearly proportional to the temperature of air at constant volume. In order to obtain the value of absolute zero from
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This law states the temperature of a gas increases or decreases by the same factor as its temperature. In other words, temperature and pressure of a gas are linearly proportional at a constant volume. Besides, this can also be explained by the ideal gas law that shows the relationship between pressure, volume and temperature of a certain amount of gas, which is related to the kinetic molecular theory. At a constant volume, the molecules gain kinetic energy from heat energy and collide each other with a higher chance as the molecules move faster. Therefore, the pressure in the molecules is formed. The more kinetic energy is gained, the higher the chance of collision, and hence the higher the …show more content…
There are three variables in this experiments: Independent variable: Temperature of gas Dependent variable: Pressure of gas Control variable: Volume of gas
The independent variable is the temperature of gas, it is altered by immersing the Jolly’s bulb in water of different temperate. According to the theory shown above, the pressure is directly proportional to the temperate. If the temperature of the gas rises, the pressure of the gas increases, and vice versa. Therefore, the pressure of gas is the dependent variable. The volume of gas in the Jolly’s bulb is fixed, hence it is the control variable in this experiment.
The list of apparatus used:
No Apparatus Purpose
1 Jolly’s bulb and gauge Used to show the pressure of the gas in the bulb
2 Beaker Used to fill the hot water and cold water
3 Thermometer Used to measure the temperature of the water
4 Ice Used to cool the gas in Jolly’s bulb
5 Hot water Used to heat the gas in Jolly’s bulb
6 Stirrer Used to stir the water in order to distribute the heat evenly in it.
7 Gloves Used to protect

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