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## Homework Statement

Given T=572 ºF, pressure= 145 psi (g) using the steam tables and ideal gas law

Molar Mass= 18 g/mol for water

Find: Is the water vapour acting ideally?

## Homework Equations

Ideal Gas Law: PV=nRT

P is the pressure =145 psi (g)

V is the molar volume

n= mol

R= Ideal gas constant 8.314 J(K^-1)(mol^-1)

T is temperature in kelvin, so temperature in farenheit= 572 ºF =573.15 ºK

How can I calculate the molar volume using the steam tables? and how can I know if the water vapour is acting ideally?

3. The Attempt at a Solution

3. The Attempt at a Solution

Ideal gas law: PV= nRT

so: V= nRT/P= (18 mol)(8.314 JK^-1mol^-1)(573.15 ºK)= 85773.04=8.5x10(^4) metres cube

where: P= 145 psi (g)=

**999739.80705 Pascals**

1 Psi = 6 894.75729 Pascals

1 Psi = 6 894.75729 Pascals