Chem Week 1-2 Flashcards
1
Q
Mass
A
Kilogram (Kg)
2
Q
Length
A
Meter (m)
3
Q
Temperature
A
Kelvin (K)
4
Q
Time
A
Second (s)
5
Q
Electric current
A
Ampere (A)
6
Q
Quantity of substance
A
mole (mol)
7
Q
Speed
A
Distance/time (m/s)
8
Q
Volume
A
Space (distance^3) m^3
Also L
1cm^3 = 1 mL
9
Q
Density
A
Mass/volume = kg/m^3 or kg/mL
10
Q
Energy
A
Joule (kgm^2/s^2)
11
Q
Power
A
Watt (Joule/s)
12
Q
deka
A
da, 1
13
Q
Tera
A
T, 12
14
Q
Giga
A
G, 9
15
Q
Mega
A
M, 6
16
Q
Kilo
A
k, 3
17
Q
Hecto
A
h, 2
18
Q
deci
A
d, -1
19
Q
centi
A
c, -2
20
Q
milli
A
m, -3
21
Q
micro
A
mu, -6
22
Q
nano
A
n, -9
23
Q
pico
A
p, -12
24
Q
femto
A
f, -15
25
temperature
measure of average kinetic energy of particles in a sample
26
compare Celsius and kelvin
Celsius: based on properties of water, boiling point 100, freezing point 0
Kelvin: based on proprieties of gas, no negative Kelvin temperature, C + 273.15
27
Accuracy
Proximity of measurement to true value of quantity
28
Precision
Proximity of several measurements to each other (small difference between measurements)
29
Uncertainty
Smallest measurable difference, determines limit of precision
30
What are sig figs?
Measured digits, number denote uncertainty
31
Element
Substances can’t be separated into simpler substances
32
Compounds
Groups of DIFFERENT elements
33
Atoms
Smallest unit of matter, building blocks of chemistry
34
Mixture
Composed of 2+ pure substances
35
Pure substance
Simplest forms of matter that can’t be separated into other kinds by physical means
36
Molecules
Two or more atoms connected by chemical bonds
37
Intensive properties
Properties that characterize pure substance (independent of amount)
38
Extensive properties
Dependent on amount of substance
39
Physical processes
Change that doesn’t alter chemical identities
40
Chemical reactions
Change into compounds with different chemical identities
41
Molecules
Groups of atoms
42
Chemical bonds
Forces!!!
43
Immiscible
Don’t dissolve into each other
44
Distillation
Separate via evaporation and condensation (works with different volatility)
45
Filtration
Filter!!
46
Chromatography
Separate substances in mixture
47
States of matter
Liquid solid gas
48
Sublimation
Solid to gas
49
Deposition
Gas to solid
50
Condensation
Gas to liquid
51
Vaporization
Liquid to gas
52
When does energy increase
Water melts/vaporizes
53
Where does energy go when water molecules freeze?
Released
54
What happens to energy of molecules of water as it melts or vaporizes?
Add energy
55
Energy
Ability to do work (exert force through a distance)
56
Work
W=fd
57
Potential energy
Stored energy (composition or position)
58
Kinetic energy
Energy of motion
KE=1/2mV^2
59
Heat
Amount of energy transferred bc of diff in temp
60
Heat moves ____ to ______
Hot to cold
61
Law of conservation of energy
Energy cannot be created nor destroyed (transformed!)
62
Diatomic molecules?
H, N, O, Fluorine (F) , Chlorine (Cl), Bromine (Br), Iodine (I)
Have No Fear of Ice Cold Beer :))
