Q)
(chatquestion)...(ii) Irreversible adiabatic expansion : In free expansion,
the external pressure is zero, i.e, work done is zero. Accordingly,
AE which is equal to w is also zero. If AE is zero, AT should be
zero. Thus, in free expansion (adiabatically), AT =0, AE = 0,
w = 0 and AH = 0.
In intermediate expansion, the volume changes from V, to
V, against external pressure, Pext·
RT, RT,
w = -Pea (V2 - V;) = -Pext
%3D
P2
P
TP-TP2
PP2
=-P
xR
TP-TP2
PP2
or w = C,(T, -T¡) = -RPext...(Ye kaha se aaya??)
...
