An insulated cylinder is fitted with an airtight piston that is free to slide up and down and is connected to a rod, as shown in the figure. 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
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