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Ees310:Principles Of Geochemistry Question Paper

Ees310:Principles Of Geochemistry

Course:Principles Of Geochemistry

Institution: University Of Eldoret question papers

Exam Year:2013

Answer all questions
1.What is geochemistry?[3m]
2.Which are the principle chemical components in
a.Crust [2m]
b.Mantle [2m]
c.Core [2m]
3.Ore genesis theory generally involves three components
a.Name the three components[3m]
b.Briefly describe each one of them[6m]
4.Briefly describe the following ore genesis process
a.Fractional distillation [3m]
b.Liquid immiscibility [3m]
5.a.What is the standard Gibb''s free energy change?[2m]
b.Calculate the change in entropy,S at 25C in the reaction in the following reaction:2NH3(g) + CO2(g)>NH2CONH2(aq)+H2O(l).The following are standard entropies of the relevant compounds in J/(mol K):NH2CONH2(aq)=174:NH3(g)=193:CO2(g)=214:H2O(l)=70[4m]

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