A gas expands against a variable pressure given by P = (20)/(V) (where P in atm and V in L). During expansion from volume of 1 litre to 10 litre, the gas undergoes a change in internal energy of 400 J. How much heat is absorbed by the gas during expansion?

A gas expands against a variable pressure given by P = (20)/(V) (where

1.	A gas expands against a variable pressure given by P = (20)/(V) (where P in atm and V in L). During expansion from volume of 1 litre to 10 litre, the gas undergoes a change in internal energy of 400 J. How much heat is absorbed by the gas during expansion?
Answer» 46 J 4660 J 5065.8 J 4260 J Solution :`intdw=int-P.DV` `"IMPLIES"w=-int20.(dV)/(V)=-20ln.(V_(2))/(V_(1))` `w=-46.06 " L-atm"=-4665.8 J` `DeltaU=q+wimplies400=q-4665.8` `q = 5065.8 J`