Answer:
1) a) It is a slow reaction kinetically.
2) a) It is a catalyst.
3) c) It lowered the activation energy of the reaction.
Explanation:
<em>1) The reaction between carbon tetrachloride, CCl₄, and water, H₂O, to form carbon dioxide, CO₂, and hydrogen chloride, HCl, has a ΔG° value of -232 kJ/mole, and so is thermodynamically favored. But when you mix carbon tetrachloride with water, no change is observed. What is a possible explanation for this?
</em>
<em>a) It is a slow reaction kinetically.</em> TRUE. This is the most likely explanation of why no change is observed.
<em>b) The activation energy of the reaction is too small.</em> FALSE. Slow reactions have a large activation energy.
<em>c) The reaction is not spontaneous.
</em> FALSE. ΔG° < 0 so the reaction is spontaneous.
<em>d)The reaction is not favored thermodynamically.</em> FALSE. ΔG° < 0 so the reaction is favored thermodynamically.
<em>2) What word best describes the role that the palladium plays in the reaction between propene and hydrogen above?</em>
It is a catalyst because it increases the rate of the reaction without being altered by the end of the reaction.
<em>3) What did the palladium do to increase the rate of the reaction between the propene and hydrogen?
</em>
<em>a)It changed the thermodynamic equilibrium.</em> FALSE. Catalysts don't affect equilibrium
<em>
b)It made the Gibbs free energy of the reaction more positive.</em> FALSE. Catalysts don't affect Gibbs free energy.
<em>c)It lowered the activation energy of the reaction.</em> TRUE. According to the Arrhenius equation, the lower the activation energy, the higher the rate constant, and the higher the rate of reaction. This is how catalysts act.
<em>d)It increased the activation energy of the reaction.</em> FALSE.
