What gases are the reactants for the haber process?
Nitrogen and hydrogen
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2
What atmosphere is used in the haber process?
200atm
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3
State the ecosystem services provided by plants
Food source and remove carbon dioxide from atmosphere
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4
What catalyst is used in the haber process?
Iron
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5
What conditions are needed for the haber process?
200 atm, 450 degrees Celsius, iron catalyst
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6
State the balanced equation for the haber process
N2 + 3H2 → 2NH3
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7
Where is the nitrogen obtained from
From the air
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8
Where is the hydrogen obtained from
From hydrocarbons
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9
Why is 200atm a good compromise
High pressures expensive and can be hazardous. 200atm acts as a compromise between rate of ammonia production and safety and cost
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10
What happens if you inc the pressure
equilibrium shifts to the right in the exothermic direction towards the products because there are less molecules there therefore inc rate of reaction
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11
What happens if you inc the temp?
Inc temp shifts equilibrium to the left in the endothermic direction therefore decreases percentage yield
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12
Why do we use 450 degrees Celsius
450 degrees is a compromise. Low temp Is ideal bc equilibrium would shift to the right in the exothermic direction and therefore inc yield. But low temp causes a slower rate of reaction bc lack of activation energy. So 450 degrees used to make ammonia faster despite the lower yield
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13
What are the ideal conditions of the haber process
High pressure, low temp
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14
Give two negative consequences of using high pressure
Expensive and dangerous
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15
Give a description of the temp used
Low enough for reasonable yield but high enough for a fast reaction
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16
Give a description of the pressure used
Low enough to not need expensive reinforced apparatus but high enough to give a reasonable yield
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Flashcard (59)