Monthly Archives: November 2008

Useful Stuff for Year 10 chemists

Exams are almost here; these resources are just to jog your memories . I suggest you download the documents and study them. I’ve tried to include the kinds of things they ask for in exams. The first one is about … Continue reading

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Making Ammonia – the Haber process

A BRIEF SUMMARY OF THE HABER PROCESS – various sources, thanks…   ΔH=-92kJ/mol thus exothermic The Haber Process combines nitrogen from the air with hydrogen derived mainly from natural gas (methane) into ammonia. The reaction is reversible and the production … Continue reading

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Power, Work and Energy

When work is done, energy is transferred. Rub your hands together, hard. They get hot. There’s no way someone could tell whether you’d dipped your hands into hot water or applied a force against the frictional resistance of your palms … Continue reading

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Breaking Water

Water is amazing stuff. Just one atom of oxygen and two of hydrogen. Splitting it into these parts turns out to be quite easy. If you’ve a couple of pieces of platinum to spare…Water undergoes a decomposition reaction under electrolysis. … Continue reading

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Aluminium from Bauxite *updated*

Aluminium is quite reactive, so can’t be extracted using a blast furnace or similar. The extraction of aluminium from its ore is expensive and not very easy, but because it’s light and alloys easily, Al is so valuable that it’s … Continue reading

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Metals, Reactivity and King Canute

Some metals are very boring and unreactive meaning they don’t easily take part in chemical reactions, if at all. Gold and platinum are like this. They don’t form oxides by reacting with oxygen in the air, even if heated strongly, and they … Continue reading

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The Fate of the Universe

              It’s ironic that the mathematics for the very large grew out of quantum mechanics – the maths of the very small. Imagine the universe during the first tiny fraction of the first second. Random … Continue reading

Posted in AS and A2 Physics | 2 Comments