Question

substances whose solubility increases slightly with temperature​

Answer 1

Sugar,Salt hope this help you

Answer 2

                         Here is your Answer                                                                                       The solubility of a given solute in a given solvent typically depends on temperature. Many salts show a large increase in solubility with temperature. Some solutes exhibit solubility that is fairly independent of temperature. A few, such as cerium(III) sulfate, become less soluble in water as temperature increases. This temperature dependence is sometimes referred to as retrograde or inverse solubility, and exists when a salt’s dissolution is exothermic; this can be explained because, according to Le Chatelier’s principle, extra heat will cause the equilibrium for an exothermic process to shift towards the reactants.

Solubility Versus Temperature: This chart shows the solubility of various substances in water at a variety of temperatures (in degrees Celsius). Notice how NaCl’s solubility is relatively constant regardless of temperature, whereas Na2SO4’s solubility increases exponentially over 0–35 degrees Celsius and then abruptly begins to decrease.

Theoretical Perspective

As the temperature of a solution is increased, the average kinetic energy of the molecules that make up the solution also increases. This increase in kinetic energy allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions.

The average kinetic energy of the solute molecules also increases with temperature, and it destabilizes the solid state. The increased vibration (kinetic energy) of the solute molecules causes them to be less able to hold together, and thus they dissolve more readily.