Back to 18.3 Structure and General Properties of the Metalloids

18.3 Exercise 14

Avg difficulty 2.5

From the data given in Appendix G, determine the standard enthalpy change and the standard free energy change for each of the following reactions:

(a) BF3(g)+3H2O(l)⟶B(OH)3(s)+3HF(g)\text{BF}_{3} \left(g\right) + \text{3H}_{2} \text{O} \left(l\right) \rightarrow \text{B} \left(\text{OH}\right)_{3} \left(s\right) + \text{3HF} \left(g\right)

(b) BCl3(g)+3H2O(l)⟶B(OH)3(s)+3HCl(g)\text{BCl}_{3} \left(g\right) + \text{3H}_{2} \text{O} \left(l\right) \rightarrow \text{B} \left(\text{OH}\right)_{3} \left(s\right) + \text{3HCl} \left(g\right)

(c) B2H6(g)+6H2O(l)⟶2B(OH)3(s)+6H2(g)\text{B}_{2} \text{H}_{6} \left(g\right) + \text{6H}_{2} \text{O} \left(l\right) \rightarrow \text{2B} \left(\text{OH}\right)_{3} \left(s\right) + \text{6H}_{2} \left(g\right)

OpenStax Chemistry 2e, 18.3 Structure and General Properties of the Metalloids, exercise 14

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Adapted from General Chemistry © 2019 Rice University. Licensed under CC BY 4.0. Sources: Chemistry 2e, Chemistry: Atoms First 2e. Imported at revision 32c7196.