C6 Flashcards

1
Q

slow rate of reaction example

A

rust, chemical weathering

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2
Q

fast rate of reaction example

A

burning

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3
Q

what factors affect rate of reaction

A

temp
concentration
surface area
catalyst

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4
Q

recall the collision theory

A

in order for collisions to be successful reacting particles must collide with sufficient energy and with proper orientation

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5
Q

what does increasing temp do?

A

move faster
collide more frequently
enough Ea

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6
Q

effect of increased conc on rate

A

more particles in same volume

frequency increase

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7
Q

effect of increased surface area

A

more area to work on

more frequent

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8
Q

effect of using a catalyst on rate

A

decrease activation energy by giving an alternative reaction pathway

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9
Q

how to measure rate

A

precipitation and colour change
mass change
volume of gas

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10
Q

drawbacks of using colour change to measure rate

A

might not agree on exact point

cant plot a graph

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11
Q

mass change is the most _____ method of measuring rate

A

accurate

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12
Q

how to measure volume of gas

A

gas syringe

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13
Q

what happens if the reaction lies to the right

A

greater conc than reactant

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14
Q

what happens if a reaction lies to the left

A

conc of reactants greater than product

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15
Q

recall le chateliers principle

A

if you change the conditions of a reversible reaction the system will try to counteract the change

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16
Q

if you decrease temp in reversible reaction

A

equilibrium will move to the exp side

17
Q

change pressure

A

system tried to reduce it

18
Q

order of gases from top to bottom in fractional distillation

A
LPG
petroleum
naphtha
kerosene 
diesel
fuel oil 
bitumen
19
Q

what is a saturated compound

A

each carbon has 4 covalent bonds

20
Q

formula for methane

A

CH4

21
Q

general formula for alkanes

A

CnH2n+2

22
Q

what is the 4th suffix in alkanes

A

but-

23
Q

combustion word equation

A

fuel + oxygen = carbon dioxide + water

24
Q

why do we use fractional distillation

A

separate different hydrocarbons from a mixture to use each more effectively

25
Q

there is a temperature ____ within the distillation column

A

gradient

26
Q

what is cracking

A

large molecules broken down by heating and over a hot catalyst

27
Q

alkenes are ______ hydrocarbons

A

unsaturated

28
Q

what happens when a large alkene is cracked

A

breaks into an alkane and an alkene