Chemistry Assignment Help with Pressure Volume Work
7.6 Pressure-Volume Work
7.6.1 Work Done in Reversible Isothermal Expansion
dw = – (Pext – dp). dV
= – Pext. dV = – PdV
w = 
w = – nRT ln 
w = – 2.303 nRT log
Since temp is constant therefore P1V1=P2V2 
wrev = – 2.303 nRT log 
7.6.2 Irreversible Isothermal Process
w = – Pext(V2 – V1)
Pext is less than the pressure of the gas, the work done during intermediate expansion is numerically less than during reversible isothermal expansion.
7.6.3 Reversible Adiabatic Process
Work done = 
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