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

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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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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