Using Pressure in a deltaS equation

[Anna Lockhart 2B]

In practice problem 4F.9 we are given the pressure changes to find the change in Entropy. How do we apply that to the equation: deltaS=nRln(V2/V1)?

[jessicaosuna_1F]

Since pressure is the inverse of volume, you can replace V2 and V1 with P2 and P1

[Blake Ballew 1H]

Since pressure is the inverse of volume for an ideal gas you're able to write the equation deltaS= nRlnP1/P2 in order to solve this problem. Now all you have to do is plug in the values :)

[Nick Pascua 2L]

Hi!

For 4F.9, instead of using volumes, just replace them with the given pressures! It would be deltaS=n*R*ln(P2/P1). The P is in atm, so also remember to use the correct R value of 0.08206 (L*atm)/(K*mol). Hope that helps!

[isha dis3d]

Since in PV=nRT, pressure and volume have an inverse relationship, so you can replace V2 and V1 with P2 and P1.