Answered: Table of Thermodynamic Values (ions are…

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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Question

Calculate the theoretic delta H_sol (m=1) of the following reaction:

Mⁿ⁺Cl^-_n*mH₂O (s) --> Mⁿ⁺(aq)+nCl^-(aq)+mH₂O (l)
for both CaCl_2*2H_2O & NH_4Cl using the table below. (The convention is that the standard enthalpy of the formation of ions in solution is referenced to 1 molal.

(Correction delta H_f (NH_4Cl (s)*2H_2O (s))=1,404 kJ/mol)

Table of Thermodynamic Values (ions are at 1 molal)
NH,CI(s)
NH,*(aq)
CI(aq)
CaCl, 2H,O(s)
Ca"(aq)
H,O(1)
4H°
-314.4 kJ/mol
-132.5
-167.2
-1457
-542.8
-285.3
S°
94.6 J/(mol K)
113.4
+56.5
203.0
-53.1
69.9
P. W. Atkins, Physical Chemistry, Tenth Edition

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