An ideal gas with = 1.40 occupies 8.26 LL at 335 KK and 74.2 kPakPa pressure.

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Question:

An ideal gas with γγ = 1.40 occupies 8.26 LL at 335 KK and 74.2 kPakPa pressure. It's compressed adiabatically to one-third of its original volume, then cooled at constant volume back to 335 KK. Finally, it's allowed to expand isothermally to its original volume. How much work is done on the gas?