Unit 6: Thermodynamics

Question 1

Temperature

Answer 1

The average amount of kinetic energy

Question 2

Heat

Answer 2

Energy flow between two substances at different temperatures

Question 3

Exothermic

Answer 3

Energy is transferred from the system to its surroundings

Question 4

Endothermic

Answer 4

Energy transfers from the surroundings into the system

Question 5

Enthalpy

Answer 5

A measure of the energy that is released or absorbed by the substance when bonds are broken/formed during a reaction

Question 6

Enthalpy of Formation

Answer 6

The change in energy that takes place when one mole of a compound is formed from its component pure elements under standard state conditions

Question 7

Bond Energy

Answer 7

The energy required to break a bond

Question 8

Melting

Answer 8

Solid to liquid

Question 9

Freezing

Answer 9

Liquid to solid

Question 10

Vaporization

Answer 10

Liquid to gas

Question 11

Condensation

Answer 11

Gas to liquid

Question 12

Sublimation

Answer 12

Solid to gas

Question 13

Deposition

Answer 13

Gas to solid

Question 14

Vapor Pressure

Answer 14

The pressure exerted by liquid/solid molecules as they escape from the surface and become gaseous

Question 15

Enthalpy of Fusion

Answer 15

Energy that must be put into a solid to melt it

Question 16

Enthalpy of Solution

Answer 16

Energy that is needed for an ionic substance to dissolve in water

Question 17

Enthalpy of Varoization

Answer 17

Energy that must be put into a liquid to turn it into a gas

Question 18

Specific

Answer 18

The ability of a substance to absorb heat without going through much of a temperature change

Question 19

Calorimetry

Answer 19

The measurement of heat changes during chemical reactions