CHAPTER 5 & 19 THERMOCHEMISTRY

Question 1

forces or attractions between charged particles

Answer 1

electrostatic

Question 2

energy of “motion”

Answer 2

kinetic

Question 3

process in which heat flows into a system from the surroundings

Answer 3

endothermic

Question 4

energy is this type of property

Answer 4

extensive

Question 5

capacity to do work or transfer heat

Answer 5

energy

Question 6

energy used to cause an object to move against a force

Answer 6

work

Question 7

measurement of heat flow

Answer 7

calorimetry

Question 8

sign on ∆H when system gains heat from surroundings

Answer 8

positive

Question 9

potential energy stored in the arrangement of atoms in a substance (2 words)

Answer 9

chemical energy

Question 10

energy a substance possesses because of its temperature (2 words)

Answer 10

thermal energy

Question 11

∆E represents the ____ in internal energy

Answer 11

change

Question 12

energy transferred from a hotter object to a colder one

Answer 12

heat

Question 13

any kind of push or pull exerted on an object

Answer 13

force

Question 14

heat capacity of 1 gram of a substance (2 words)

Answer 14

specific heat

Question 15

relationships between chemical reactions and energy changes

Answer 15

Thermochemistry

Question 16

one of most important types of reactions studied using calorimetry

Answer 16

combustion

Question 17

SI unit of energy

Answer 17

joule

Question 18

energy that is “stored”

Answer 18

potential

Question 19

amount of heat required to raise the temperature of an object by 1° C (2 words)

Answer 19

heat capacity

Question 20

system which can exchange energy but not matter with its surroundings (2 words)

Answer 20

closed system

Question 21

heat gained or lost under constant pressure; denoted with the letter H

Answer 21

enthalpy

Question 22

sign on ∆ H when the system loses heat to surroundings

Answer 22

negative

Question 23

study of energy and its transformation

Answer 23

thermodynamics

Question 24

the first law of thermodynamics says that energy is ____

Answer 24

conserved!

Question 25

enthalpy changes depend on the ____ of the reactants and products

Answer 25

state

Question 26

amount of energy required to raise 1g water 1° C; equal to 4.184 J

Answer 26

calorie

Question 27

balanced equations that show the associated enthalpy change (2 words)

Answer 27

Thermochemical equations

Question 28

process in which heat flows out of a system into the surroundings

Answer 28

exothermic

Question 29

sum of all the kinetic and potential energy of all components of a system (2 words)

Answer 29

internal energy

Question 30

type of calorimeter used to study combustion reactions

Answer 30

bomb

Question 31

limited portion of the universe to which attention is paid in studying energy changes

Answer 31

system

Question 32

apparatus that measures heat flow

Answer 32

calorimeter