(b) Glycerol reacts with nitric acid (HNO3) to produce a colourless liquid, Comp

Question

(b) Glycerol reacts with nitric acid (HNO3) to produce a colourless liquid, Compound D (Reaction 1). This reaction is undertaken in the presence of a catalyst (sulfuric acid, H2SO4).

C3H8O3(l) + 3HNO3(l) %u21CC C3H5(NO3)3(l)+ 3H2O(l) %u2206H = %u2212364 kJ mol%u22121 (1) Compound D

(i) StatewhetherReaction1isexo-orendothermic(asinglesentence)anddrawa fully labelled diagram to show how the internal energy changes during the process represented by Reaction 1. Indicate on your diagram the energy barrier for the reaction.

(ii) Explain the role of sulfuric acid in terms of the energy barrier of Reaction 1. (Guideline: one or two sentences.)

Explanation / Answer

nitro glycerine, sulphuric acid is catalyst,

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