Iodine is not very soluble in water, but it dissolves readily in a solution containing iodide ions

Question:

Iodine is not very soluble in water, but it dissolves readily in a solution containing iodide ions by the following reaction:

I(aq) + (aq)  13(aq)


The following graph shows the results of a study of the temperature dependence of ΔG° for this reaction. (The solid line is a best fit to the actual data points.)

Notice that the quantity on the y axis is ΔG°/T, not just ΔG°. Additional data relevant to this reaction are also given in the table that follows the graph.

AG/T (kJ/K) -0.050 -0.052 -0.054 -0.056 -0.058 -0.060 0.0030 0.0031 0.0032 0.0033 0.0034 0.0035 0.0036 0.0037


(a) Calculate ΔG° for this reaction at 298 k. (DO NOT read this value off the graph. Use the data given to calculate a more accurate value.)

(b) Determine ΔH° for this reaction. Assume that ΔH° is independent of T. ( You will need to use the graph provided to find ΔH°. It may help if you realize that the graph is a straight line and then try to write an equation for that line.)

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For  book-img-for-question

Chemistry For Engineering Students

ISBN: 9780357026991

4th Edition

Authors: Lawrence S. Brown, Tom Holme

Question Posted: