Dissolved in water containing coffee, not in coffee.
A solute that can be dissolved into a solvent to form a homogeneous mixture known as a solution. Common examples include salt dissolving in water or sugar dissolving in coffee.
a physical change
Salt is dissociated in ions in the solution; sugar is not dissociated.
Physical
Sugar is less dense than salt, leading to it dissolving faster.
Dissolving is a familiar process. Salt, for example, dissolves readily in water, as does sugar in coffee. On a molecular level, dissolving consists of the molecules of a solute -- salt or sugar -- encountering and pairing up with the molecules of a solvent -- water or coffee. Only when a successful pairing is made can the solute dissolve into the solvent. To increase the rate at which a solute dissolves, you must increase the rate at which molecules within the solute can encounter and subsequently pair with molecules within the solvent.
okay let's say your putting sugar into coffee the solute is the sugar and solvent is the coffee. The Solvent coffee dissolves the solute "sugar" homogeneously amongst the solution. So the answer to your question is the solvent does the dissolving
Sugar dissolving in water. Salt dissolving in water. Oil not dissolving in water. Ethanol dissolving in water. Carbon dioxide dissolving in soda.
No, dissolving sugar in coffee is a process of solvation, not osmosis. Osmosis involves the movement of water molecules across a semi-permeable membrane to equalize the concentration of solute on both sides, which is not happening in this scenario.
The dissolving of salt or sugar in water is a physical change because only the appearance of the substances is altered, not their chemical composition. The salt or sugar molecules remain the same; they are simply dispersed in the water at a molecular level.
Because after dissolving a solution is formed and separate substances are invisible now.
The coffee remains coffee, and the sugar is simply dissolved. Thus, it is a physical change.