Science.7.6.E

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The student is expected to investigate and model how temperature, surface area, and agitation affect the rate of dissolution of solid solute in aqueous solution.
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Knowledge and Skills Statement

Matter and energy. The student distinguishes between element and compound, classifies changes in matter, and understands the properties of solution.

Matter at any temperature above absolute zero contains thermal energy. Thermal energy is the random motion (kinetic energy) of particles (vibrations in solids or free motion in a gas), and this energy is distributed among all the particles in a system. Temperature and agitation affect rates of dissolution because they increase the thermal energy of the particles in the solution. Surface area affects the rate of dissolution because a larger surface area has more of the solute particles exposed to the solvent.

the act or an instance of agitating something; a moving back and forth or with an irregular, rapid, or violent action such as rapid shaking or stirring

solution that occurs when a solid, liquid, or gaseous substance (solute) is evenly distributed within water (solvent)

a pure substance that is made up of two or more different elements in a specific ratio

a pure substance that is made up of one type of atom 

substance that occupies space, has mass, and is composed of microscopic particles

the part of a solution in the smaller quantity, often the solid or gas dissolved into a liquid

a substance in which a solid, liquid, or gaseous substance is evenly distributed (or dissolved) within a liquid or sometimes a gas or solid

the number of square units necessary to cover the surface of a three-dimensional object without gaps or overlaps

the measure of the average kinetic energy of the particles within a substance; a measure of heat energy; measured in degrees Celcius

Research

Mabbett, Terry. "A different view of the same old grind: great coffee is usually credited to the ideal blend or perfect roast level. However, the step in between beans and brew is often overlooked. The grinding of the beans takes skill, knowledge and expertise, but the results are well worth the effort." Tea & Coffee Trade Journal 179, no.9 (September  2007): Gale General OneFile. https://link.gale.com/apps/doc/A169591141/ITOF?u=txshrpub200873&sid=bookmark-ITOF&xid=e0daaa6c

Summary: " A Different View of The Same Old Grind" uses the grinding of coffee beans to illustrate increasing surface area affecting the rate of dissolution as well as concentration.