1. For the reaction A ï‚š B, Î”H = -25kJ. Rewrite this equation to show the 25kJ properly
on the reactant or product side.
2. If C + 30kJ ï‚š D, what is Î”H for the reaction? Which have more energy, the
reactants or the products?
3. What happens to the shape of the KE distribution curve for a reacting species
a) as the reactant is used up at a constant temperature?
b) if the temperature is decreased?
c) if the surface area of a reactant is increased?
d) if the pressure of the reactant is increased with no change in temperature?
4. Draw PE diagrams for each of the following:
a) fast exothermic reaction.
b) slow exothermic reaction.
c) fast endothermic reaction.
d) slow endothermic reaction.
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