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Le Chetelier's Principal gives us a guide to work out what will happen when we change the conditons of a reaction in dynamic equilibrium. It states that if the dynamic equilibiurm is disturbed, the equili...

Gibbs Free Energy change: (delta)G = (delta)H - T(delta)S For a spontaneous chemical reaction, (delta)G must be negative. An endothermic reaction has a positive (delta)H value therefore, in order for the ...

Structure is integral to achieving the top marks, and can make all the difference between writing a good essay and writing a great essay. At A-Level you have probably learnt to structure your essay into t...

The first, and perhaps most important, step is to 'deconstruct' the essay question. Essentially what you need to do is find 'the heart' of the question, this will usually allude to a certain thesis that y...

Momentum is conserved. MU + mu = (M+m)v   (1200 x 8) + (800 x 0) = (1200 + 800)v 9600 = 2000v v = 9600/2000 = 4.8m/s