Unit 1: Chapters 1-4 Flashcards Preview

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Flashcards in Unit 1: Chapters 1-4 Deck (73)
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1

Density equation

D= m/v

2

Specific gravity equation
Units?

S.G. = Dsolute/DH2O
NO UNITS

3

High specific gravity has large quantities of proteins in (solutes/solvent-water) than (solutes/solvent-water)

in solutes-salts/sugar/proteins than solvent-water

4

Low specific gravity has much more (solutes/solvent-water) than (solutes/solvent-water)

much more solvent-water than solutes-salts/sugar/proteins

5

Low specific gravity is close to __'s density

water's density

6

Elements are __ substances

pure substances

7

Compounds are __ substances

pure substances

8

Mixtures are a __ combination

physical combination

9

Homogeneous mixtures are

mixed so well you CANNOT distinguish the different components visually

10

In heterogeneous mixtures you (can/can't) ...

you CAN distinguish the components but may need a microscope

11

Heterogeneous mixture examples

blood, milk

12

Physical properties are

properties that can be observed WITHOUT changing the identity of the substance under observation

13

Physical property examples

temp at which a substance changes state (boiled water is still water), size, malleability, conductivity, density, etc.

14

Chemical properties can only be observed...

DURING a change in the identity of the substance under observation

15

Chemical property examples

a chemical might be corrosive, combustible, explosive, etc.

16

Physical change is

a process that does NOT change the identity of the substance under observation (just a change in physical state)

17

Physical change examples

melting, boiling, grinding, etc.

18

Chemical change is

a process that DOES change the identity of the substance under observation

19

The formation of a new compound in chemical changes are also called

Reactions

20

Chemical change examples

rusting, tarnishing, burning, etc.

21

Temperature equation for ℃ and ℉

5F= 9C+160

22

Temperature equation(s) for ℃ and K

K-273= C
C+273= K

23

Absolute zero= _ K
K (is/isn't equal to) negative values

Absolute zero= 0 K
K ≠ negative values

24

Specific heat definition

the amount of heat required to raise the temperature of 1 gram of a substance 1℃

25

Specific heat equation (written)

Specific heat = amount of heat energy/mass × change in temp

26

Specific heat equation (with coefficients)

Cp = Q/m • ∆T

Q = m•Cp•∆T
∆T= Tfinal - Tinitial

27

Specific heat coefficients:
Cp=
Q=
m=
∆T=

Cp= specific heat
Q= amount of heat
m= mass
∆T= change in temp

28

Specific heat units

J/g • ℃ or cal/g • ℃

29

Specific heat units of water

4.184 × J/g • ℃ = 1.0cal/g • ℃

30

Heat energy units

joule (J) and calorie (cal)