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Chemistry of Life > Chapter 3 > Flashcards

Chapter 3 Flashcards

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1
Q

T or F- a pure substance has constant composition

A

T

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2
Q

can an element be broken down?

A

no

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3
Q

can a compound be broken down?

A

yes

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4
Q

what is a mixture composed of?

A

two or more types of matter

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5
Q

what type of mixture is uniform throughout and components can not be seen?

A

homogenous

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6
Q

what type of mixture does not have uniform composition and components appear as separate?

A

heterogenous

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7
Q

what out of the two are heterogenous? concrete or air

A

concrete

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8
Q

what out of the three are homogenous? air, water, or ranch

A

air

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9
Q

what out of the two is an element? copper metal, or bronze (mixed metal)

A

copper metal

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10
Q

what out of the two is a compound? table salt or oxygen

A

table salt

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11
Q

definite shape/volume

A

solid

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12
Q

definite volume/ NO definite shape

A

water

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13
Q

NO definite volume or shape

A

gas

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14
Q

physical properties change but identity stays the same

A

physical change

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15
Q

substance is converted into a new substance

A

chemical change

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16
Q

chemical or physical change? cooking an egg

A

chemical

17
Q

chemical or physical change? water freezing

A

physical

18
Q

chemical or physical change? rust

A

chemical

19
Q

chemical or physical change? sugar dissolved in water

A

physical

20
Q

chemical or physical change? sugar heated into caramel

A

chemical

21
Q

equation for converting Tf to Tc

A

Tf-32/1.8

22
Q

conversion factor for cal and joules

A

1 cal.4.184 J

23
Q

calculate the heat released when 100g of water (c=4.18J/gC) inside a calorimeter changes temp from 25 to 50C

A

10450J

24
Q

assuming blood has the same specific heat as water, calculate the heat lost when a child with 3000g of blood is put in an ice bath and cooled from 39.4 to 36.8*C (list both Js and kJs- formate xJ or xkJ)

A

-3260.4J or -32.6kJ

25
Q

heat absorbed

A

endothermic

26
Q

heat released

A

exothermic

27
Q

solid to gas

A

sublimation

28
Q

liquid to gas

A

vaporization

29
Q

solid to liquid

A

melting

30
Q

gas to solid

A

deposition

31
Q

gas to liquid

A

condensation

32
Q

liquid to solid

A

freezing

33
Q

endothermic or exothermic: sublimation

A

endothermic

34
Q

endothermic or exothermic: vaporization

A

endothermic

35
Q

endothermic or exothermic: melting

A

endothermic

36
Q

endothermic or exothermic: deposition

A

exothermic

37
Q

endothermic or exothermic: condensation

A

exothermic

38
Q

endothermic or exothermic: freezing

A

exothermic

Chemistry of Life (5 decks)

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