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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