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14.1 Thirsty Solutions: Why You Shouldn't Drink
The more you move down the list, the more polar the molecule becomes.
As you move down the list, the molecule becomes more polar, more water-soluble, and less water-soluble.
As you move down the list, the molecule becomes less polar, lesssoluble in water, and moresoluble in hexane.
As you move down the list, the molecule becomes less polar, more water and lesssoluble.
Although forming a solution does not involve a chemical reaction, it can produce an energy change just like the chemical reactions discussed in Chapter 7.
The factors that determine if energy is absorbed or released are explored in this section.
When a solution forms, the energy changes that occur depend on the size of the interactions between the solute and solvent particles.
Other solutions, such as salt in water, don't absorb or evolve heat.
The solute is separated into its particles.
The solvent particles should be separated to make room for the solute particles.
The energy needed to overcome the intermolecular forces among the solvent particles is endothermic.
The solvent particles are mixed with the solute particles.
As the solute particles interact with the solvent particles, energy is released.
While the overall energy of the system remains nearly constant, the increasing entropy upon mixing drives the formation of a solution.
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