Apiston performs work of 210. l·atm on the surroundings, while the cylinder in which it is placed expands from 12 l to 27 l. at the same time, 45 j of heat is transferred from the surroundings to the system. against what pressure was the piston working?

14atm

Explanation:

to solve this, equate the work done by the piston to the change in volume of the cylinder.

work done by the piston w = PV = 210

i.e. 210 L atm = (27 -12) L

     210 = 15

            = 14atm

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