CHE3161 Week 5/6

What is residual properties?

• The leftover thermodynamic properties at the beginning of a process

• The differences between Real and ideal thermodynamic properties

• The lost properties upon a completion of a process

• The additional properties to ideal condition upon completion of a process

We are moving from P1T1 to P2T2, how to we find a thermodynamic properties in step wise?

• Breaking each step to "real to ideal" -> "ideal P1 to P2 with fixed T" -> "ideal T1 to T2 with fixed P" -> "ideal to real"

• Breaking each step to "real to ideal" -> "ideal P1 to P2 with fixed T" -> "ideal T1 to T2 with fixed P"

• Good morning

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What happen to the properties of a fluid above the critical point in a P-T phase diagram

• It became vapor

• It became liquid

• It is indifferentiable between vapor and liquid

• It now comprises liquid and vapor mixture

How many types of phase diagram have you seen so far?

• 1

• 2

• 3

• 4

What can be determined using Van der Waals equation of state?

• Sat liquid line (bubble point)

• Sat vapor line (dew point)

• Critical point

• Mixture line

Reduced properties are useful for

• Estimating the properties of two different substances that share a similar compressibility factor

• Estimating the properties of two different substances that share a similar acentric factor

• Estimating the properties of two different substances that are in ideal condition

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Gibbs free energy of a liquid is equivalent to that of a vapor when they are at

• isobaric

• isothermal

• compressed

• equilibrium

Fugacity helps determine

• Gibbs energy

• Ideal gas

• Equilibrium

• Mathematics

For an ideal gas, the fugacity and fugacity coefficient are

• T and 1

• P and 2

• T and P

• P and 1

Gibbs free energy can be solely a function of pressure if

• dV = 0

• dP = 0

• dT = 0

• dS = 0