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NeedPhysHelp8

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**Solving for volume in Van der Waals Equation??**

## Homework Statement

Determine the specific volume, v (volume per mass[m^3/kg]) of a water steam at a pressure of 100kPa and a temperature of 500 degrees Celsius by assuming an ideal gas (pV = nRT) and by using the van der Waals equation for n moles

## Homework Equations

pv = nRT

van der waals equation (p + n^2a/V^2)(V-nb) = nRT

## The Attempt at a Solution

alright I got the first part no problem as i used the molar mass of air to be 18.0g/mol and I got the specific volume to be 3.57 m^3/kg. The second part of the question is confusing me because I have no clue how to solve for the volume for Van der Waals! any help please?