Chapter 18, Problem 49GQ

Elemental boron, in the form of thin fibers, can be made by reducing a boron halide with H₂.

BCl₃(g) + $\raisebox{1ex}{$3$}\!\left/ \!\raisebox{-1ex}{$2$}\right.$ H₂(g) → B(s) + 3 HCl(g)

Calculate Δ_rH°, Δ_rS°, and Δ_rG° at 25 °C for this reaction. Is the reaction predicted to be product-favored at equilibrium at 25 °C? If so, is it enthalpy- or entropy-driven? [S° for B(s) is 5.86 J/K · mol.]