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Chem 120 > Chem Quiz Chapter 3 > Flashcards

Chem Quiz Chapter 3 Flashcards

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1
Q

Types of Pure substances

A

elements
compounds

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2
Q

elements

A

molecules of one type of element

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3
Q

compounds

A

molecules of 2+ elements

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4
Q

types of mixtures

A

homogeneous
heterogeneous

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5
Q

mixtures

A

2+ compounds

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6
Q

homogeneous mixtures

A

appear to have same composition throughout

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7
Q

heterogeneous mixtures

A

no uniform composition

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8
Q

solids in terms of shape and volume

A

definite shape
definite volume

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9
Q

liquids in terms of shape and volume

A

indefinite shape
definite volume

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10
Q

gas in terms of shape and volume

A

indefinite shape
indefinite volume

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11
Q

physical property

A

observable/measurable characteristics

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12
Q

chemical property

A

ability of a substance to interact with others and/or change into another

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13
Q

physical change

A

change in state/physical shape

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14
Q

chemical change

A

change in composition/identity

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15
Q

signs of chemical changes

A

bubbles, gas, change in color

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16
Q

energy

A

ability to do work

17
Q

kinetic energy

A

energy of motion

18
Q

potential energy

A

stored energy

19
Q

thermal energy

A

energy released as heat
associated with temperature

20
Q

heat

A

transfer of kinetic energy
associated with particle movement

21
Q

units for heat in metric system

A

calories

22
Q

units for heat in SI system

A

Joules

23
Q

1 Calorie is how many calories

A

1,000 calories

24
Q

1 calorie is how many Calories

A

10-3 Calories

25
Q

what is the definition of a calorie

A

the heat needed to increase the temperature of 1 g of a substance by 1 degrees C

26
Q

1 calorie is how many Joules

A

4.184 Joules

27
Q

K -> C

A

C = K -273

28
Q

C -> K

A

K = C +273

29
Q

C -> F

A

F = 1.8C +32

30
Q

F -> C

A

C = (F-32)/1.8

31
Q

Specific Heat =

A

q / (m x deltaT)

32
Q

Definition of specific heat

A

energy needed to heat up 1 gram of substance by 1 degree C

33
Q

what does q represent in SH equation

A

heat
calories = metric
Joules = SI

34
Q

1 Cal = ? kCal

A

1 kcal

Chem 120 (1 decks)

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