A sudden expansion or compression is
considered as an adiabatic process as there
will be no time sufficient for exchanging the
heat generated to the surroundings. Now if a
gas is comprised to half its volume first
rapidly and then slowly, in which case the
work done will be greater.why??
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The short answer is: Because heat exchange typically proceeds slowly. Thus, if your process occurs fast enough, heat exchange does not have time to occur in any significant way, and the process is adiabetic for lack of heat exchange.
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