Charle’s Law Lab Report
Chemistry B
January 26, Tuesday, 2020
Miranda Kendricks
All experiments start with a hypothesis to a question; “What is the effect of a gas’ temperature on
it’s volume?”. My hypothesis is, “If a fixed amount of gas is heated, then teh volume will increase
because the heat will cause the molecules of gas to move faster and further apart. To test this hypothesis,
I’d have to change the temperature of the gas between 0 and 100 degrees celsius. The variables of this
experiment are the temperature and volume. The temperature is independent and the volume is a
dependent variable.
The materials consist of a 600 mL beaker, tongs, tweezers, a thermometer, a centimeter ruler, a
wire guaze, hot plate, hot pad, ice, a rubberband, capillary tube, and water. To start the experiment, I
measure the radius of the capillary tube of 0.2cm. Then, I start preparing the tube by putting in an oil
stopper and connecting the capillary tube to the centimeter ruler with the rubberband. Afterwards, I fill
the beaker with ice and water until the liquid reaches 600 mL; the tube and ruler is put inside the beaker
Next, I measure the volume of air near 0 degrees celsius. I use the tongs to put the beaker onto the hot
plate. When the water is heated, I use the tong to take out the beaker and start measuring the details of the
gas. For example, the temperature is 3 degrees celsius, the volume is 0.72cm, and the height is 5.7cm^3. I
then repeat this routine for the rest of my experiment. Now, I’m measuring the volume of air near 20
degrees celsius. The results of the temperature is 21 degrees celsius, the height is 6.2cm, and the volume
is 0.78cm^3. The next step is the measure the volume of air near 40 degrees celsius. Temperature changes
to 40 degrees celsius, the height to 6.7cm, and the volume to 0.84cm^3. Then, I measure the volume of air
near 60 degrees celsius. The temperature is now 57 degrees celsius, the height is 6.9cm, and the volume is
0.87cm^3. Afterwards, I start to measure the volume of air near 80 degrees celsius. Temperature; 82
degrees celsius. Height; 7.4cm. Volume; 0.93cm^3. Finally, I measure the volume of air near 100 degrees
celsius. The temperature of gas changs to 98 degrees celsius, the height to 7.4cm, and the volume to
0.98cm^3.
I drew the Temperature(k) vs. Volume(cm^3) in a simple chart, which made me to believe that
the ratio of the volume divided by the temperature is 0.002 (V/T = 0.72/276 = 0.002). The average of all
the six fractions also resulted to 0.002 (V/T = 0.002). This conclusion leads me to believe that the
reciprocal ration of T/V is constant. Therefore, the average ration should be 380. (the chart is drawn
below)
In conclusion, my hypothesis is correct; “If a fixed amount of gas is heated, then the volume will
increase because the heat will cause the molecules of gas to move faster and further apart.
Temperature (k)
Volume (cm^3)
276
0.72
294
0.78
313
0.84
330
0.87
355
0.93
371
0.98