Calculate the work energy, w, gained or lost by the system when a gas expands from 15 l to 35 l against a constant external pressure of 1.5 atm

The work done by the gas is about 30 L.atm

The Ideal Gas Law and Work formula that needs to be recalled is:

where:

W = Work ( J )

P = Pressure ( Pa )

V = Volume ( m³ )

n = number of moles ( moles )

R = Gas Constant ( 8.314 J/mol K )

T = Absolute Temperature ( K )

Let us now tackle the problem !

Given:

initial volume = Vo = 15 L

final volume = V = 35 L

constant pressure = P = 1.5 atm

Asked:

word done by the gas = W = ?

Solution:

The work done by the gas is about 30 L.atm

Grade: High School

Subject: Physics

Chapter: Pressure

asthenosphere and convection