An ideal gas has a temperature-independent molar specific heat cv at constant volume.Let gama=cp/cv denote the ratio of its specific heats.The gas is thermally insulated and is allowed to expand quasi-staically from an initial volume Vi at temperture Ti to a final volume Vf.
a) Use the reation pV^Gama=constant to find the final temperature Tf of this gas.
b) use the fact that the entropy remaine constant in this process to find the final temperature Tf.