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2 . 0 moles of an ideal gas are initially in a container of 4 5 . 0 d m 3 at 2 9 8
moles of an ideal gas are initially in a container of at The container has a moveable piston covered with sand. Calculate the work performed for parts a through d below. All processes are isothermal.
a A scoop of sand is removed, and the gas expands to The final pressure of the gas is equal to the external pressure.
b The sand is added back onto the piston, and the gas compresses to The final pressure of the gas is equal to the external pressure.
c Sand is removed again, but this time, one grain at a time until the volume is The external pressure changes with each grain of sand removed.
d The sand is added back, but one grain at a time until the volume returns to The external pressure changes with each grain of sand added.
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