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14 Cards in this Set
- Front
- Back
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What is ammonia?
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A raw material used in the manufacture of fertilisers, explosives and cleaning fluids.
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How is ammonia produced?
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Using a reaction between nitrogen and hydrogen called the Haber process.
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Production costs of the Haber process are based on different factors, including:
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The price of energy, labour, raw materials, equipment and the rate of reaction.
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What's the symbol for ammonia?
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NH3
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Some ammonia is converted into:
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Nitric acid which itself is used in the manufacture of fertilisers and explosives.
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Ammonia is a vital route by which nitrogen in the air can be made available to plants to enable them to:
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Build protein molecules
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Plants cannot use nitrogen directly from the air. What do they need?
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Nitrogen compounds, dissolved in water, which they absorb through their roots.
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What would happen without synthetic, ammonia-based fertilisers?
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The world would be unable to grow enough food to feed its population.
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The raw materials for the Haber process are:
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Hydrogen and nitrogen
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How is hydrogen obtained?
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By reacting natural gas with steam, or from cracking oil fractions
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Where is nitrogen obtained from?
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The air.
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What is the percentage of nitrogen in the air?
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78%
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When hydrogen is burned in air, the oxygen combines with:
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The hydrogen, leaving nitrogen behind.
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In the Haber process, nitrogen and hydrogen react together under these conditions:
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>a high temperature - about 450ºC>a high pressure>an iron catalyst
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