Ideal Gas Law and Pressure Activities (3/3/2015)

Prof Mason is heating a can containing water and is about to place it in a beaker filled with ice water. 

After being heated and placed in ice water, the can rapidly imploded

Prof Mason is heating another can, which contains no liquid this time.

After being placed in ice water, the empty can does not implode. Water did flow from the beaker into the inside of the can however.

The graph depicts the results of my group’s Pressure vs Volume experiment. The fit equation depicted is incorrect. Although a quadratic equation fits this part of the graph properly, if it is extrapolated then the fit will begin to curve upwards, while the graph continues to approach 0 pressure. The correct fit equation is an inversely proportional one 

My group’s prediction of the relationship between pressure and volume, before our experiment was conducted.

Explanation of the inverse fit equation.

More explanation of the inverse fit equation

Prof Mason conducting and experiment to display the relationship between Pressure vs Temperature.  This was done by heating a sealed flask.  

Graph for the PvT data. The fit is a linear, directly proportional relationship. 

Our prediction for the relationship between Pressure and Temperature

Our prediction for the relationship between Volume and Temperature.

Prof Mason conducting an experiment to show the relationship between Volume vs Temperature.

Data representing the relationship between Volume vs Temperature. Although not shown, the fit shows a linear, directly proportional relationship.

Calculations done relating the two statements of the Ideal Gas Law, where the Universal Gas Constant is divided by Botlzmann’s Constant.

Work done solving for the Dive Bell example.

(More Complete Work) Work done solving for the Dive Bell example, showing how high the level of water inside the bell will rise when submerged. This leaves a small pocket of air in the bell.

Bell Jar Experiment. A weakly inflated balloon was placed in a bell jar, and the air inside was then drawn out in order to reduce the pressure inside the jar.

After a majority of the air inside the jar was withdrawn, in order to maintain equilibrium, the balloon became larger to compensate for the loss of pressure outside of the balloon.  The pressure inside the balloon increased.

A video of the same bell jar experiment, but this time done using two marshmallows.

After air was funneled back into the jar, we can see that the marshmallows are now smaller than their original size.

More calculations for the dive bell problem.

Work done solving for the High Altitude Balloon problem.