A cylinder equipped with a piston expands against an external pressure of 1.64 atm . If the initial volume is 0.535 L and the final volume is 1.290 L , how much work (in J) is done
We have relation, Work done = - P ex Volume change
Where , P ex is external pressure and Volume change = final volume - initial volume
Work done = - 1.64 atm ( 1.290 L - 0.535 L )
= - 1.64 atm ( 0.755 L)
= - 1.238 L atm
We have relation, 1 L atm = 101.328 J
Work done = - 1.238 L atm ( 101.328 J / 1 L atm) = - 125.44 J
ANSWER : Work done = - 125.44 J
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