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Chemistry > Alkanes > Flashcards

Alkanes Flashcards

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0
Q

What are the conditions needed for catalytic cracking?

A

Temperature: 720 kelvins
Pressure: 1000 kilopascals

Zeolite catalyst

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1
Q

What are the conditions of thermal cracking?

A

Temperature: 1000 kelvins
Pressure: 7000 kilopascals

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2
Q

What are the products of thermal cracking?

A

Short alkenes and alkanes

High percentage of alkenes

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3
Q

What are the products of catalytic cracking?

A

Branched alkanes, cycloalkanes and aromatic compounds

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4
Q

What are the 2 intermediates of cracking?

A

Free radicals - thermal

Carbocations - catalytic

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5
Q

What do catalytic converters do?

A

They oxidise carbon monoxide using unburned hydrocarbons.

They remove pollutants.

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6
Q

Write the equation of a catalyst removing nitrogen oxides from a car engine

A

2NO -> N2 + O2

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7
Q

How sulfur dioxide be prevented from emission into the atmosphere?

A

Using calcium carbonate

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Chemistry (7 decks)

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