Thermodynamics

NRTL is a model for ....

• Activity coefficients

• Vapor fugacity

• Liquid density

• Enthalpy

Peng-Robinson (Equation of state) cannot be used to estimate ...

• Departure enthalpy

• Liquid density

• Vapor fugacity coefficients

• Viscosity

At critical point, pressure derivative with respect to volume at constant temperature is ...

• positive

• negative

• zero

• infinite

For an ideal gas, enthalpy depends on ...

• pressure and temperature

• temperature

• density and temperature

• pressure and density

Can UNIQUAC represent Liquid-Liquid Equilibrium?

• No

• Yes

Ideal Gas model can be used if

• Vapor at low pressure

• Vapor near to critical point

• liquid at high temperature

• non polar mixture at high pressure

For a pure component, if two phases exist, how many degrees of freedom does the system have?

• 0

• 1

• 2

• 3

To use UNIFAC in a binary mixture, you must know ...

• average molecular weigth

• structure of both components

• normal boiling point of mixture

• non randomnes factor for each component

SAFT is

• Equation of state

• Activity model

• Viscosity model

• Thermal conductivity model

Methane is a molecule

• Polar

• Non-polar

• Adiabatic

• Isochoric