Chapter 6 Key Terms

Question 1

Bomb Calorimeter

Answer 1

Equipment designed to measure energy change of a reaction for combustion at constant volume

Question 2

calorie (cal)

Answer 2

Unit of energy, the energy required to rause 1 gram of water 1*C. Equal to 4.184 J

Question 3

Calorie (Cal)

Answer 3

Shorthand notation for kcal, used on nutritional labels

Question 4

Calorimetry

Answer 4

Experimental procedure to measure heat evolved in a chemical reaction

Question 5

Chemical Energy

Answer 5

Energy associated with relative positions of electrons and nuclei in atoms and molecules

Question 6

Coffee Cup Calorimeter

Answer 6

A piece of equipment that measures enthalpy change of a reaction at constant pressure

Question 7

Endothermic reaction

Answer 7

Reaction that absorbs heat from surroundings

Question 8

Energy

Answer 8

Capacity to do Work

Question 9

Enthalpy (H)

Answer 9

Sum of internal energy of a system and product of pressure and volume

Question 10

Exothermic Reactions

Answer 10

Reaction that releases heat into surroundings

Question 11

First Law of Thermodynamics

Answer 11

Total energy of the universe is constant

Question 12

Heat (q)

Answer 12

Flow of energy caused by temperature difference

Question 13

Heat Capacity (C)

Answer 13

THe quantity of heat required to change a systems temperature by 1*C

Question 14

Heat of Reaction (DeltaHrxn)

Answer 14

Enthalpy change of chemical reaction

Question 15

Hess’s Law

Answer 15

Law stating that deltaH of a reaction is the sum of deltaH of all steps

Question 16

Internal energy (H)

Answer 16

Sum of potential and kinetic energies within the system

Question 17

Joule (J)

Answer 17

SI unit for energy. 1 kg*m^2/s^2

Question 18

Kilowatt Hour (kWh)

Answer 18

An energy unit used primarily to express large amounts of energy produced by the flow of electricity

Question 19

Kinetic energy

Answer 19

The energy of an object associated with movement

Question 20

Law of Conservation of Energy

Answer 20

law stating energy can never be created or destroyed

Question 21

Molar heat capacity

Answer 21

Amount of heat to raise temperature of 1 mol of object by 1*C

Question 22

Potential energy

Answer 22

Energy associated with position or composition of a substance

Question 23

Pressure-volume work

Answer 23

Work that occurs when volume change takes place against external pressure

Question 24

Specific head capacity (Cs)

Answer 24

Amount of heat to raise 1g 1*C

Question 25

Standard Enthalpy Change (DeltaH*)

Answer 25

Change in enthalpy for process when all reactants and products are in standard states

Question 26

Standard Enthalpy of Formation (detaH*f)

Answer 26

Change in enthalpy when 1 mol of compund forms from elements in standard states

Question 27

Standard State

Answer 27

Pure gas at pressure 1 atm, or pure substance at 1 atm, a certain temperature, or concentration of 1 M

Question 28

State function

Answer 28

Function whose value depends only on state, not path

Question 29

Surroundings

Answer 29

everything in the universe that is not the system of interest

Question 30

System

Answer 30

point of universe of interest

Question 31

Thermal energy

Answer 31

Kinetic energy associated with temperature of object

Question 32

Thermal equilibrium

Answer 32

Point at which there is no net transfer of heat between system and surroundings

Question 33

Thermochemistry

Answer 33

Chemistry of heat

Question 34

Work (w)

Answer 34

Result of a force acting through difference