Remove the gas bulb from the hot water and let it cool down for a few minutes. Lookat the piston apparatus. The spherical gas bulb (mounted on the ring stand) is connected to it via plastic tubing. The piston/plunger part itself is virtually air-tight, but there are two pathways for gas to get in or out – through the tubes at the bottom that connect to the two white ports (there may already be something connected to one or two of them via external tubes). Connecting one tube to the pressure sensor will stop gas from flowing past it (and allow monitoring of pressure); turning the blue valve on the other tube will similarly allow (blue knob parallel to tube) or prevent (blue line perpendicular to tube) gas from reaching the gas bulb In our case, we want gas to to flow freely between the gasbulb and the piston, with the pressure sensor tube attached.7Blue Valve closed (piston closed to bulb)Blue Valve open (piston open to bulb)First disconnect the pressure sensor tube from the piston housing, loosen the piston screw(counterclockwise), and and move the piston to approximately the mid-position of its travel range. While maintaining the plunger's mid-position, re-attach the pressure sensor tube and ensure that the piston stays at roughly mid-position. Predict what will happen to the position of the piston:
(i) When the gas bulb is immersed in a hot bath (you can use the hot water in stainless steel bucket)
(ii) When the gas bulb is immersed in a a cold bath (you can use ice water in white plasticbucket)
(iii)Do both experiments, and explain your results in terms of the ideal gas law. Also, watch the pressure as the piston moves up or down – does it change? Would you expect it to change? Is this a constant pressure or constant volume process? Does your pressure reading support your answer