I presume from category that the question ask about the heat of dissolution.
Assume the solvent and solution is at thermal equilibrium.
Adding more solvent would yield change in interaction for non ideal solution and thus it could yield increase or decrease of temperature depend on the infinite heat of solution of the solute that we interested in.
Adding more solvent would not yield temperature change for ideal solution.
The solution is more diluted.
The solution becomes more diluted and the concentration gets higher.
When more solvent is added to a solution to decrease it's concentration the action is known as dilution.
Adding solvent will make a solution more diluted. Think of it this way. Take water (solvent) and dissolve salt into it (solute). In order to dilute or increase the ratio of solvent to solute, you would add more water.
Saturation is the point a solution reaches where no more solute will dissolve in the solvent.
I presume from category that the question ask about the heat of dissolution. Assume the solvent and solution is at thermal equilibrium. Adding more solvent would yield change in interaction for non ideal solution and thus it could yield increase or decrease of temperature depend on the infinite heat of solution of the solute that we interested in. Adding more solvent would not yield temperature change for ideal solution.
When soap is added to water, water is the solvent
If the solute is soluble, it will dissolve in the solvent.
When enough sugar is dissolved into the solvent (water) , or goes 'in to solution' , that no more will dissolve , the solvent is said to be 'saturated'. The more solvent you have the more sugar you can put into solution. No more sugar will dissolve once the solvent (now your solution) is saturated.
The addition of solute to a solvent concentrates the overall solution. A nice example is the laundry detergent. Some (less) concentrated detergents are less viscous, while highly concentrated detergents are more viscous (greater density). Also, adding more solute to a solvent can lower the freezing point.
When a solute is added to a solvent until no more dissolves, the solution is said to be saturated. In some cases a solution can be made to be supersaturated by temporarily increasing the solubility of the solvent, such as through an increase in temperature.
solute and solvent together constitutes a solution
Solution: a solute (or more) in a solvent. Solute: the dissolved substance in a solvent. The solute must be soluble in the solvent.