Question

Calculate the maximum work when 24 g of oxygen are expanded isothermally and reversibly from a pressure of 1.6 bar to 1 bar at 298 K.​

Answer 1

Answer:

Solution:-

Given weight =24g

Molecular weight =32g

No. of moles (n)=

32

24

=0.75 mol

As we know that work done in an isothermal process is given as-

W=−2.303nRTlog

P

2

P

1

Given:-

T=298K

P

1

=1.6×10

5

Pa=160kPa

P

2

=100kPa

Therefore,

W=−2.303×0.75×0.0821×298×log

100

160

⇒W=−42.26×log1.6=−8.62atm−L