CHEE2015 - Equation of State

Compressibility factor (Z) is given by

• RT/PV

• PV/RT

• (RT/PV)²

• (PV/RT)²

For an ideal gas, the compressibility factor (Z) value is

• Z < 1

• Z = 1

• Z > 1

• It depends to the P-V-T values

What assumptions are made for the ideal gas equation?

• There is no attraction between the molecules of the gas.

• The volume occupied by the molecules is negligible.

• Both of the mentioned.

• None of the mentioned.

In which condition can real gas obey closely the ideal gas equation?

• Pressure is very small and temperature is very high.

• Pressure is very high and temperature is very low.

• Both pressure and temperature are very high.

• Both pressure and temperature are very low.

Choose the correct form of van der Waals EoS:

• (P+(a/V²)) (V+ b) = RT

• (P + (a/V²)) (V– b) = RT

• (P– (a/V²)) (V – b) = RT

• (P – (a/V²)) (V+ b) = RT

Which of the following statement is true about the correction terms in vdW EoS?

• "a" accounts for mutual attraction between the molecules.

• The term a/(v²) is called the force of cohesion.

• "b" accounts for the volumes of the molecules.

• All of the mentioned.

Value of constant 'a' in vdW EoS increases with increase in:

• intramolecular forces.

• ionic bond.

• intermolecular forces.

• covalent bond.

"Any compound should have the same Z at the same reduced P and reduced T" is known as:

• Law of corresponding states.

• Law of critical state.

• Law of reduced state.

• Laws of thermodynamics.

Choose the FALSE statement for the second virial coefficient listed below:

• It represents the deviation from ideal-gas behaviour.

• The value needs to be determined at certain temperature.

• It has the unit of (molar volume/temperature).

• It has the same unit as molar volume.

List the functional groups of 2-butanol and its number of occurrence.

• 2 (CH₃), 1 (OH)

• 1 (CH₃), 1 (CH3), 1 (OH)

• 2 (CH₃), 1 (CH2), 1 (CH), 1 (OH)

• 2 (CH₃), 2 (CH), 1 (OH)