Question

Reversible expansion
of an ideal gas under
isothermal and
adiabatic conditions
are as shown in the
figure.
AB Isothermal expansion
AC - Adiabatic expansion
Which of the following options is not
correct?
(a) Assothermal > AS adiabatic
(b) TA= Tb
(c) W isothermal > W adiabatic
(d) Tc > TA (Odisha NEET 2019)
ans;d
please explain each options individually...​

Answer 1

Explanation:

a ) I do not understand the Option .

B ) for isothermal work , it's obvious that temperature change is 0 . Therefore Ta=Tb

c) if the gas is doing isothermal work, the slope is generally less steep. Therefore, the work done (the area under the PV curve) is typically bigger and hence , work done in isothermal process is more than work done in adiabatic process .

d) [this is the correct answer to this question ]

why ?

when you do adiabatic expansion , there is no exchange of heat between system and surrounding. This means , while expansion ,vthe heat required, cannot be supplied to adiabatic system and hence is looses it's heat energy for doing work in form of expansion . Therefore , Tc is not equal to Ta. Rather , Ta is more than Tc .

please update option a so that I can explain .

Thank you .

hope this helps .

all the best for your future endeavours ♥️

Jai hind .