thermochemistry

Question 1

concerned with heat changes that occur during chemical reactions

Answer 1

thermochemistry

Question 2

the science of the relationship between heat and other forms of energy

Answer 2

thermodynamics

Question 3

-the capacity of doing work or supplying heat
-weightless, odorless, tasteless
-if within the chemical substances, it is called chemical potential energy

Answer 3

energy

Question 4

characteristics of energy

Answer 4

weightless, odorless, tasteless

Question 5

if within the chemical substances, energy is called what

Answer 5

chemical potential energy

Question 6

Three Broad concepts of energy

Answer 6

kinetic energy, potential energy, internal energy

Question 7

energy associated with an object by virtue of its motion

Answer 7

kinetic energy

Question 8

energy an object has by virtue of its position in a field of force

Answer 8

potential energy

Question 9

the sum of the kinetic and potential energies of the particles making up a substance

Answer 9

internal energy

Question 10

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

Answer 10

Law of Conservation of Energy

Question 11

all the ___ is accounted for as work, stored energy, or heat

Answer 11

energy

Question 12

All the energy is accounted for as what

Answer 12

work, stored energy, heat

Question 13

the total energy of a system is the sum of its kinetic energy, potential energy, and internal energy

Answer 13

U

Question 14

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

Answer 14

heat

Question 15

only changes can be detected

Answer 15

heat

Question 16

flows from warmer to cooler objects

Answer 16

heat

Question 17

in studying heat changes, think of defining these 2 parts

Answer 17

The system, the surroundings

Question 18

the part of the universe on which you focus your attention

Answer 18

the system

Question 19

includes everything else in the universe

Answer 19

the surroundings

Question 20

heat flowing out of a system into its surroundings

Answer 20

exothermic process

Question 21

-defined as negative
-q has a negative value
-called exothermic
-system loses heat (gets cooler) as the surroundings heat up

Answer 21

exothermic process

Question 22

heat flowing into a system from its surroundings

Answer 22

endothermic process

Question 23

-defined as positive
-q has a positive value
-called endothermic
-system gains heat (gets warmer) as the surroundings cool down

Answer 23

endothermic process

Question 24

the quantity of heat needed to raise the temperature of 1g of pur water to 1 degree celsius

Answer 24

calorie

Question 25

also related to the Joule, the SI unit of heat and energy

Answer 25

calorie

Question 26

1 cal is equivalent to

Answer 26

4.184J

Question 27

1g

Answer 27

calorie

Question 28

1kg

Answer 28

Calorie

Question 29

the amount of heat needed to increase the **temperature of an object exactly 1 degree celsius**

Answer 29

heat capacity

Question 30

depends on **both** the object's **mass** and its **chemical composition**

Answer 30

heat capacity

Question 31

the amount of heat it takes to raise the temperature of 1g of a **substance** by 1 degree celsius

Answer 31

specific heat capacity

Question 32

specific heat capacity is abbreviated by

Answer 32

C

Question 33

Specific heat capacity is often called simply

Answer 33

specific heat

Question 34

types of thermochemical equations

Answer 34

exothermic reaction, endothermic reaction

Question 35

the products are **lower** in energy than the reactants. thus, energy is **released**

Answer 35

exothermic reaction

Question 36

the products are **higher** in energy than the reactants. thus, energy is **absorbed**

Answer 36

endothermic reaction

Question 37

the symbol is H

Answer 37

enthalpy

Question 38

change in enthalpy is what

Answer 38

∆H

Question 39

if heat is released, the heat of the content of the product is lower

Answer 39

exothermic (delta H is negative)

Question 40

if heat is absorbed, the heat content of the products is higher

Answer 40

endothermic (delta H is positive)

Question 41

the **measurement of heat into or out** of a system for chemical and physical processes

Answer 41

calorimetry

Question 42

heat released is equals to what

Answer 42

the heat absorbed

Question 43

calorimetry is measured using what

Answer 43

calorimeter

Question 44

absorption or release of heat in chemical or physical processes

Answer 44

calorimetry