Answer to Question #103666 in General Chemistry for Beverlie

Question

3. Consider the dissolution of NaBr and NaI. The values provided here will be helpful for answering the following questions.
ΔH∘soln (kJ/mol) ΔS∘soln Jmol•K​
NaBr –0.860 57.0
NaI –7.50 74.0
a.Write a balanced equilibrium equation for the dissolution of NaI in water. Include phases.
b. Calculate the change in free energy if 1.18 moles of NaI is dissolved in water at 25.0°C.
c. What is the dissolution of 1.00 mol of NaBr at 298.15 K?

Answer 1

a. NaI (s) + H₂O (l) = Na⁺(aq) + I^- (aq)

b. -29.6 kJ

с. non spontaneous