Chem Exo And Endo

Front 1

types of energy

Back 1

heat, sound, light, mechanical, chemical, electrical, nuclear, kinetic, potential

Front 2

transducer

Back 2

something that converts one form of energy to another form of energy

Front 3

energy

Back 3

the ability to do work

Front 4

2 types of reactions

Back 4

endothermic and exothermic

Front 5

endothermic

Back 5

absorbs heat and temp decreases

Front 6

exothermic

Back 6

releases heat and temp increases

Front 7

which way does heat travel

Back 7

from higher temp to lower temp

Front 8

spontaneous

Back 8

happens w/o energy

Front 9

not spontaneous

Back 9

uses energy

Front 10

matter

Back 10

anything that has mass and takes up space

Front 11

what are all changes accompanied by

Back 11

changes in temp.

Front 12

homogenous

Back 12

uniform

Front 13

heterogeneous

Back 13

not uniform

Front 14

extensive physical properties

Back 14

says how much you have of something

Front 15

intensive physical properties

Back 15

view of something

Front 16

boiling pt and freezing pt..chemical or physical properties?

Back 16

physical

Front 17

endothermic phase changes

Back 17

solid-->liquid-->gas
(SLG)

Front 18

exothermic phase changes

Back 18

gas-->liquid-->solid
(GLS)

Front 19

what keeps water molecules apart

Back 19

attraction between molecules

Front 20

energy of activation

Back 20

energy needed to start a reaction (EA)

Front 21

what does the heat in a. endothermic phase change do?

Back 21

break the bonds-energy stored in the bonds is released

Front 22

potential energy and stability

Back 22

more potential energy=less stability

Front 23

A+B---->C
products/reactants?

Back 23

A+b are reactants
C is product

Front 24

in an exothermic reaction, it the potential energy greater in the reactant or the product over time?

Back 24

potential energy is greater in hte reactant

Front 25

in an endothermic reaction, is the potential energy greater in the reactant or the product over time?

Back 25

potential energy is greater in the product

Front 26

two other names for delta H

Back 26

1. heat of reaction
2. enthalpy

Front 27

formula for heat of reaction

Back 27

ProdPE-ReactantsPE/
PEp-PEr
(product's potentail energy-reactants potential energy)

Front 28

exo/endo negative or positive heat of reaction

Back 28

exo=positive h of r
endo-negative h of r

Front 29

where is the first time you see liquid water on a heating curve

Back 29

0 degrees

Front 30

when does the water end

Back 30

100 degrees

Front 31

what is teh relationship between temp and kinetic energy

Back 31

direct

Front 32

heat energy formula

Back 32

Q=m(delta)TC

Front 33

specific heat

Back 33

4.18 J/g K

Front 34

heating curve is what kind of reaction

Back 34

endothermic

Front 35

cooling curve is what kind of reaction

Back 35

exothermic

Front 36

scientic name for freezing

Back 36

crystallization/solidification

Front 37

exothermic phase changes

Back 37

freezing (crystallization/solidification) and condentation

Front 38

scientic name for melting

Back 38

fusion

Front 39

endothermic phase changes

Back 39

melting (fusion) and vaporization (boiling)