Question

Read the following lab report from a chemistry experiment. Determine their hypothesis.
We wanted to know how temperature affected the volume of a gas. We investigated this by filling a balloon with air and heating and cooling it, comparing the circumference of the balloon before and after. Our results showed the balloon get bigger when heated and smaller when cooled. These results support our hypothesis.

A) Gases expand when heated and contract when cooled.
B) Gases contract when heated and expand when cooled.
C) The gas temperature will not impact the circumference of the balloon.
D) Volume and temperature are not related.

Answer 1

Answer:-

A) Gases expand when heated and contract when cooled.

Explanation:-

The experiment performed in the lab showed that the circumference of the balloon was more and the volume of the balloon was bigger when it got heated. Since a balloon is filled with gas, we can form a hypothesis that gases expand on heating.

Similarly since the balloons contract on cooling, it is the gases which are again the ones which are going contraction on cooling.

Thus gases expand on heating and contract on cooling.

Note:-

This hypothesis is in fact called Charles Law