Which of the following changes most directly accounts for the positive entropy…
CHEMISTRY · Single correct · A Level · Chemistry · Thermodynamics · Thermodynamics
Problem
Which of the following changes most directly accounts for the positive entropy contribution when an ionic crystal dissolves in liquid water under standard conditions?
(a) Re-orientation of water molecules to form hydration shells around the ions
(b) Dispersion of the ions from an ordered lattice into a dispersed solution phase
(c) Formation of ion–dipole interactions that lower the potential energy of the system
(d) Breaking of hydrogen bonds among water molecules, increasing their freedom of motion