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in this video we calculate the work in a gas expansion against the constant external pressure or in the last video we have seen how to derive a generic expression for the calculation of work in any gas expansion our root expression the one that always works for any gas expansion expansion is this one what weamp;#39;ll do right now is just apply this expression to the simplest case for I guess expansion and is one that is very common and thatamp;#39;s the one where you have a constant external pressure okay so think about these guys we have two moles of an ideal gas 288 Kelvin in a volume that is 10 liters now weamp;#39;re gonna try to expand that gas against the constant external pressure of one atmosphere and weamp;#39;re gonna do it until the volume doubles okay so the question is well what is the amount of work done by the system in this gas expansion itamp;#39;s pretty young is that the agent of the work is the system the system is pushing out the piston into the surroundings
