Chapter 3

Question 1

The maximum point in the equilibrium curve of a pure substance in a PT diagram

Answer 1

Critical

Question 2

For the cubic equations of state, at a given P and T, you may have 3 roots for V. If the given P is lower than the saturation pressure, which root value should be selected.
a. smallest
b. middle
c. largest
d. any of the three

Answer 2

C

Question 3

An aqueous solution of ethanol in equilibrium with its vapor has degrees of freedom equal to

Answer 3

1

Question 4

At very low pressures Z approaches

Answer 4

unity

Question 5

In a PV diagram for pure substance, the state where all 3 phases co-exist occurs as a

Answer 5

Line

Question 6

Flow work for an ideal gas undergoing an isothermal process is equal to

Answer 6

Zero

Question 7

The ratio between Cp/Cv for monatomic gas is

Answer 7

1.67

Question 8

Which of the following is true for a superheated vapor at a given P and T

Answer 8

T>Tsat, P<Psat

Question 9

When does a real gas obey the ideal gas equation closely

Answer 9

at low Pressure and high Temperature

Question 10

In a PV diagram for a pure substance, a much steeper sloping line represents what process

Answer 10

Adiabatic

Question 11

For a work requiring process, the relations of ideal work to actual work

Answer 11

Wrev < Wirrev