make sure the piston screw is still loosened (counterclockwise). move the piston to the lowest position possible by releasing the air by disconnecting the pressure sensor tube, then re-attaching. now put a 100g or 200g mass on top of the piston platform and predict what will happen when you immerse the gas bulb in hot water. do the experiment, note the results and explain them in terms of the first law and the work done on or by the mass. again, think of whether this process is a constant pressure or constant volume one. (10 pts)

Piston compressors, also known as reciprocating compressors, piston air compressors work with the help of large pistons driven by a crankshaft.
These are the more traditional type of compressor, with a lot of moving parts. This design characteristic contributes to some of a piston compressor’s biggest downsides because it increases friction and heat.
Screw compressors use two helical screws to compress the air, but the key difference is that the screws don’t touch each other.
Since there’s no contact, there’s less wear and tear, reducing maintenance needs for screw compressors and making them more reliable. This mechanism provides other benefits for heat production, noise level, size, efficiency and oil content in output air.
One of the most valuable benefits of a screw compressor is the ability to run one continuously. Since there’s less risk for overheating and wear, it can run without a duty cycle.

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