It is found when an unknown solid solute is dissolved in water that the solubility of the solid increases if temperature is increased. What can be determined about the entropy and enthalpy of the dissolution of this unknown solid?

Entropy increases and endothermic

Explanation:

The solid mentioned in the question, dissolves more when the temperature is increased. Also, increasing solvation of the salt increases the entropy. Thus, on increasing temperature, entropy will increase as more salt dissolves which results in more randomness.

On increasing temperature, the reaction rate increases which corresponds to endothermic reactions. Hence, the enthalpy of the dissolution will be positive and endothermic in nature.