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An insulated cylinder is fitted with an airtight piston that is free to slide up and...

An insulated cylinder is fitted with an airtight piston that is free to slide up and down and is connected to a rod. Contained within the cylinder is an ideal gas initially at a pressure of 120 kPa and temperature of 293 K. Suddenly the piston is forced downward creating an additional 200 kPa of pressure on the gas and as a result the cylinder volume decreases to one-half of its original volume.

(a) What is the final temperature of the gas?

(b) This process is best described as (circle one option): Isothermal, Isovolumetric, Isobaric, Adiabatic, None of these.

(c) Justify your choice for part (b).

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