Differentiating Characteristics

Question 1

Homogeneous Mixture

Answer 1

Combinations of substances that have uniform compositions.

Question 2

Heterogeneous Mixture

Answer 2

Different substances that can be in same or different phases.

Question 3

Differentiating Characteristic

Answer 3

A property that can be used to identify a substance .

Question 4

Intensive Properties

Answer 4

Differentiating characteristics that do not depend on the amount of the substance.

Question 5

Extensive Properties

Answer 5

Differentiating characteristics that depend on the amount of the substance.

Question 6

Intensive Properties Examples

Answer 6

Boiling Point, Melting Point, Density, Viscosity, Color, Temperature, Hardness, Malleability, Ductility, Solubility

Question 7

Extensive Properties Examples

Answer 7

Volume, Mass, Size, Weight, Length

Question 8

What differentiates a Temperature vs Time graph to an Energy vs Temperature graph?

Answer 8

The Temp. vs T graph has horizontal lines on the phase transitions and the E vs Temp graph has vertical lines on the phase transitions.

Question 9

What is the liquid to gas phase transition called?

Answer 9

Vaporization

Question 10

What is the gas to liquid phase transition called?

Answer 10

Condensation

Question 11

What is the liquid to solid phase transition called?

Answer 11

Freezing

Question 12

What is the solid to liquid phase transition called?

Answer 12

Melting

Question 13

What is the solid to gas phase transition called?

Answer 13

Sublimation

Question 14

What is the gas to solid phase transition called?

Answer 14

Deposition

Question 15

Does melting, boiling, and sublimation require the addition or release of the energy?

Answer 15

Addition of energy

Question 16

Do the reverse processes; solidification, condensation, and deposotion require the addition or release of energy?

Answer 16

Release of energy

Question 17

In general, what happens to temperature as the a substance undergoes a phase transition?

Answer 17

The temperature remains constant while undergoing a phase transition.

Question 18

In general, what happens to energy as a system undergoes a phase transition?

Answer 18

Energy either gets released or absorbed, depending on the substance.

Question 19

True or False:

The larger the change in density induced by the phase transition, the larger the energy transfer.

Answer 19

True

Question 20

What is a triple point?

Answer 20

A state in which the three different phases coexist which each other. Found on a phase diagram.

Question 21

What is a critical point?

Answer 21

The point in a phase diagram in which the substance starts to become indistinguishable.

Question 22

What is a supercritical fluid?

Answer 22

In a phase diagram, at temperatures and pressures higher than the critical point, the gas and liquid phases are indistinguishable from each other.

Question 23

What is vapor pressure?

Answer 23

when a liquid enclosed in a sealed container evaporates to a certain extent producing vapor that exerts pressure on its surroundings.

Question 24

In relation to vapor pressure, how does boiling occur?

Answer 24

Boiling occurs when the vapor pressure of a liquid becomes equal to the external pressure acting on the fluid, as the gas can then freely escape.

Question 25

What are characterisitics of more volatile substances?

Answer 25

Liquids have higher vapor pressures than less volatile fluids at any given temperature. Lower boiling points. The curve to the left in vapor pressure graph.