Lab Report Gas Law

Lab Report

Purpose: 1. To test Mariotte's Law 2. To test Charles' law 3. To test Gay-Lussac's law 4. To test ideal gas law

Theory: Mariotte’s law Charles’ law Gay-Lussac's law Ideal gas law

Apparatus: beaker, boiling water, thermometer, pressure-meter, oil, closed tube.

Procedure:
1) Set up all the apparatus
2) Open the rubber cap. Move the closed tube several times to ensure that the oil is spread equally.
3) Pour boiling water into the beaker and put thermometer into beaker.

1. Mariotte’s law
1) Move closed tube to let gas volume be 2 unit volume (V0=2).
2) Cover the rubber cap.
3) Move the tube to make volume change, and measure the pressure.

2. Charles’ law
a. Let Volume be V0=2.
b. Put tube into the boiling water
c. Change the temperature of gas
Measure the pressure

3. Gay-Lussac’s law
1 Change the volume and temperature and make sure that pressure won’t change

4. Ideal Gas Law
a. Let volume be 2 unit volume.

Data:
V(unit volume)
2
1
3
4
P(*105Pa)
1
2
0.7
0.47
P*V
2
2
2.1
1.88

V(unit volume)
2
2
2
T=273+t
301
331
351
P(*105Pa)
1
1.2
1.35
P/T
0.0033
0.0036
0.0038

P(*10^5Pa)
1
1
1
T=273+t
305
335
354
V(unit volume)
2
2.31
2.35
V/T
0.0066
0.0068
0.0066

T=273+t
304
333
361
V(unit volume)
2
2.6
2.7
P(*10^5Pa)
1
0.9
1.2
P*V/T
0.00657
0.00702
0.00892

Conclusion:
1. Mariotte’s law
P*V is always constant within the proper error.

2. Charles’ law
P/T is always constant within the proper error.

3. Gay-Lussac’s law
V/T is always constant within the proper error.

4. Ideal gas law
P*V/T is always constant within the proper error.

Error:
The air of the closed tube may escape through the oil on the slit.
The temperature of the water can not be completely constant.