Answered: 1. 2HI(g)↔ H2(g) + I2(g) Substance HI…

Chemistry & Chemical Reactivity

9th Edition

ISBN:9781133949640

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter15: Principles Of Chemical Reactivity: Equilibria

Section15.4: Using Equilibrium Constants In Calculations

Problem 1RC: 1. Graphite and carbon dioxide are kept at constant volume at 1000 K until the reaction C(graphite)...

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1.
2HI(g)↔ H2(g) + I2(g)
Substance HI
H2
I2
Initial Concentration (M) 0.30
0.00
0.00
Equilibrium Conc. (M) 0.24
0.030
?
In an experiment involving the reaction shown above, a sample of pure HI was placed inside a rigid container at a certain temperature. The table above provides the initial and equilibrium concentrations for some of the substances in the reaction. Based on the data, which of the following is the value of the equilibrium constant (Keq) for the reaction, and why?
a. Keq=2.5×10−1, because [I2]eq=2×[HI]eq.
b. Keq=6.3×10−2, because [I2]eq=1/2[HI]eq.
c. Keq=1.6×10−2 , because [I2]eq=[H2]eq . d.Keq=3.1×10−2,because [I2]eq=2×[H2]eq.

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