QUESTION 1 a) Define rate of reaction. Write the expression to show the relationship between the rate of disappearance of mercury(II) chloride, HgCl2 and the rate of formation of mercury(1) chloride, Hg2Cl2. 2HgCl2 (aq) + C2042- (aq) → 2CI-(aq) + 2CO2 (g) + Hg2Cl2 (s) b) Calculate the activation energy, Ea (in J mol-1) of a reaction occurring at 679 K given that the forward reaction has a rate constant, k of 7.8 s-1 and Arrhenius constant, A of 16.3 s-1. State the effect on the Ea value when temperature is increased. The gas constant, R is 8.314 J mol-1 K-1.

Chemistry: The Molecular Science
5th Edition
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Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter11: Chemical Kinetics: Rates Of Reactions
Section: Chapter Questions
Problem 11.ACP: (Section 11-5) A rule of thumb is that for a typical reaction, if concentrations are unchanged, a...
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QUESTION 1
a) Define rate of reaction. Write the expression to show the relationship between the rate of
disappearance of mercury(II) chloride, HgCl2 and the rate of formation of mercury(1)
chloride, Hg2Cl2.
2HgCl2 (aq) + C2042- (aq) → 2CI-(aq) + 2CO2 (g) + Hg2Cl2 (s)
b) Calculate the activation energy, Ea (in J mol-1) of a reaction occurring at 679 K given that
the forward reaction has a rate constant, k of 7.8 s-1 and Arrhenius constant, A of
16.3 s-1. State the effect on the Ea value when temperature is increased. The gas
constant, R is 8.314 J mol-1 K-1.
Transcribed Image Text:QUESTION 1 a) Define rate of reaction. Write the expression to show the relationship between the rate of disappearance of mercury(II) chloride, HgCl2 and the rate of formation of mercury(1) chloride, Hg2Cl2. 2HgCl2 (aq) + C2042- (aq) → 2CI-(aq) + 2CO2 (g) + Hg2Cl2 (s) b) Calculate the activation energy, Ea (in J mol-1) of a reaction occurring at 679 K given that the forward reaction has a rate constant, k of 7.8 s-1 and Arrhenius constant, A of 16.3 s-1. State the effect on the Ea value when temperature is increased. The gas constant, R is 8.314 J mol-1 K-1.
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