Chapter 17 Vocab

Question 0

Chemical potential energy

Answer 0

The energy stored in the chemical bonds of a substance

Question 1

Thermochemistry

Answer 1

The study of energy changes that occur during chemical reactions and changes in state

Question 2

Heat

Answer 2

Represented by q, is the energy that transfers from one object to another because of a temperature difference between them

Question 3

System

Answer 3

The part of the universe on which you focus your attention

Question 4

Surroundings

Answer 4

Include everything else in the universe

Question 5

Law of conservation of energy

Answer 5

States that in any chemical or physical process, energy is neither created nor destroyed

Question 6

Endothermic process

Answer 6

A system that absorbs heat from it’s surroundings

Question 7

Ectothermic process

Answer 7

A system that releases heat to it’s surroundings

Question 8

Heat capacity

Answer 8

The amount of heat needed to increase the temperature of and object exactly 1degree C

Question 9

Specific heat

Answer 9

The amount of heat it takes to raise the temperature 1g of the substance 1 degree C

Question 10

What is the equation to find specific heat?

Answer 10

Heat(joules or calories)/ mass(g) X change in temperature(degreesC)

Question 11

Calorimetry

Answer 11

The precise measurement of heat flow into or out of a system for chemical and physical processes

Question 12

Calorimeter

Answer 12

The insulated device used to measure the absorption or release of heat in chemical or physical processes

Question 13

Enthalpy(H)

Answer 13

The heat content of a system at constant pressure is the same as this

Question 14

Thermochemical equation

Answer 14

A chemical equation that includes the enthalpy change

Question 15

Heat of reaction

Answer 15

The enthalpy change for the chemical equation exactly as it is written

Question 16

Heat of combustion

Answer 16

The heat of reaction for the complete burning of one mole of a substance

Question 17

Molar heat fusion

Answer 17

The heat absorbed by one mole of a solid substance as it melts to a liquid at a constant temperature

Question 18

Molar heat solidification

Answer 18

The heat lost when 1 mole of a liquid solidifies at a constant temperature

Question 19

Molar heat vaporization

Answer 19

The amount of heat necessary to vaporize one mole of a given liquid

Question 20

Molar heat condensation

Answer 20

The amount of heat released when 1 mole of vapor condenses at the normal boiling point

Question 21

Molar heat solution

Answer 21

The enthalpy change caused by dissolution of one mole of substance

Question 22

Hess’s law of heat summation

Answer 22

States that you add two or more thermochemical equations to give a final equation, then you can also add the heats of reaction to give the final heat of reaction

Question 23

Standard heat of formation

Answer 23

The change in enthalpy that accompanies the formation of one mole of a compound from it’s elements with all substances in their standard states at 25 degreesC