3/17 Entropy

Purple Peeper Beaker (Purple People Eater) Not related to science at all.

Stirling Engine still running even after being removed from the hot and cold reservoirs.

The Stirling Engine operates by putting a two reservoirs of different temperature (the bigger the temperature difference the faster the engine) below and above the engine to make it run. Depending on which is cold and which is hot, the windmill will rotate differently.

This is Stirling Engine when there is a hot reservoir below the engine and a cold reservoir above the engine. The windmill is spinning clockwise.

The cold and hot reservoir are swapped making the Stirling Engine rotate counter clockwise.

We drew graphs of how different processes behave in a temperature vs. entropy graph. We also calculated the efficiency of the Stirling Engine we experimented with in class. The temperatures used were the temperature of the cold and hot reservoirs.

We are introduced to COP(Coefficient of Proficiency) and are asked to calculate the heat energy given the information marked in red. It turns out that we did not need the molar mass, or volume since we can calculate Qh by Work*COP.

We are introduced to Epsilon and are asked to calculate it given the formula for it and the values marked in green. 

We calculated for the final temperature when entropy is equal to zero.

We derived an equation that can be used when entropy is equal to zero.

We found the Coefficient of Proficiency by finding the efficiency of the system and multiplying that by the max COP. Part b shows that we calculated for Qh with the information found in part a.

We calculated the amount of time it would take to phase change water into ice if all the energy inside the fridge was directly affecting the water. We found this number to be practically impossible.

 Professor Mason uses bubbles to show that bubbles that are denser than the air would fall to the ground. 

In this picture, Mason creates a bubble formed from methane gas to show that it floats and that if it were lit on fire, the bubble would instantly vaporize.