Question

A sample of nitrogen gas expands in volume from 16 L to 5.4 L at constant

temperature. Calculate the work done in joules if the gas expands (a) against
a vacuum, (b) against a constant pressure of 0.80 atm.

Please answer if yk

Answer 1

a. W = 0 J

b. W = - 308.028 J

Further explanation

Given

Nitrogen gas expands in volume from 1.6 L to 5.4 L

Required

The work done

Solution

Isothermal :

W = -P . ΔV

Input the value :

a. At a vacuum, P = 0

So W = 0

b. At pressure = 0.8 atm

W = - 0.8 x ( 5.4 - 1.6)

W = -3.04 L.atm ( 1 L.atm = 101.325 J)

W = - 3.04 x 101.325

W = - 308.028 J