Which of the following processes are spontaneous? I.dissolving more solute in an unsaturated solution
II.dissolving more solute in a saturated solution
III.dissolving more solute in a supersaturated solution

Question

Quizplus · Accepted Answer

Spontaneous processes occur without any external input and tend to increase the stability of the system. In option I, dissolving more solute in an unsaturated solution is spontaneous because the solution is not yet saturated and can accommodate more solute without reducing its stability. However, options II and III involve dissolving more solute in a saturated or supersaturated solution, respectively. Since the solution is already at its maximum stability and any further addition of solute would result in the precipitation of excess solute, these processes are not spontaneous. Therefore, option B is the best choice as it correctly identifies the spontaneous process (I) among the given options.

Which of the Following Processes Are Spontaneous? I