3. Chem Thermo. Basic Concepts

Question 1

What is the difference between extensive and intensive properties?

Answer 1

Extensive is dependent of mass and intensive is independent of mass.

Question 2

How many properties needed to define a state of system?

Answer 2

2
-measured or deduced
-intensive or extensive

Question 3

What do you do to the pressure to boil water at 26 degree celcius?

Answer 3

Reduce the pressure

Question 4

Is boiling point intensive or extensive properties?

Answer 4

Intensive

Question 5

What does state function only concern about?

Answer 5

Final value ( eg change in temperature, PE, U)

Question 6

What does path function takes into account

Answer 6

How to get to the final state (e.g W,Q)

Question 7

Describe the relationship between pressure and temperature

Question 8

Describe the relationship between flow and pressure/ tempt

Answer 8

When a liquid flows through a pipe from tank terminal to process plant, due to the frictional loss, the pressure of the liquid gradually decreases.

Question 9

What is the boiling point of water?

Answer 9

The boiling point of water is 100 °C at atmospheric pressure, i.e. 1 atm.

Question 10

How does water hand boiler works?

Answer 10

• when grabbing, warmth of the hand heat the volatile liquid causing it to evaporate
• higher vapour pressure will push the liquid upward to the top sphere