Question

Observations noted after cooling a balloon

Data

Initial temp of air in balloon

(F)

98.6

Initial temp of air in balloon (C)

37

Initial temp of air in balloon (K)

310.1

Circumference of balloon at beginning (cm)

60

Volume of balloon at beginning (cm)

3648 cm^3

Refrigerated temperature of air in the balloon (F)

O

Refrigerated temperature of air in the balloon (C)

-17.8

Circumference of balloon after refrigeration (cm)

58

Volume of balloon after refrigeration (cm)

3295 cm^3

* *

Observations noted after heating a balloon

Data

Initial temp of air in balloon (F)

98.6

Initial temp of air in balloon (C)

37

Initial temp of air in balloon (K)

310.1

Circumference of balloon at beginning (cm)

63

Volume of balloon at beginning (cm)

4223 cm^3

Heated temperature of air in the balloon (F)

121

Heated temperature of air in the balloon (C)

49.4

Circumference of balloon after heating (cm)

65

Volume of balloon after heating (cm)

4638 cm^3

I gathered the above data for a chemistry lab and I could use some help analyzing the results. The main conclusions I made was that as temperature of the gas increased in the balloon, the volume increased, and when temperature of the gas decreased, volume decreased. Likewise, when the volume of the gas increased or decreased, so did its pressure.

1) Am I correct in these conclusions?

2) Also, are there any other conclusions I could make from this data?

3) For instance, are there other possible variables I need to account for?

4) Is it possible that the atmospheric pressure may have changed as I did my experiment?

5) If it did change, then how would my results have been affected?

Thank you!

#### Top Answer

1) According to Charles's law (V T), at constant pressure, if the temperature increases, then the volume of the... View the full answer