Showing posts with label chemical change. Show all posts
Showing posts with label chemical change. Show all posts

Tuesday, March 30, 2010

Chemistry

Ok – my grade in English class is plummeting downhill faster than a spacecraft making its decent. For this reason, I am going to spend all of today to attempt to raise the grade. Ah, if only my blog posts don’t take an average of three hours to complete. Goodness, a day solely dedicated for English class. I guess is the sacrifice to make for failure to complete my work.

Matter

I have no idea particularly why I want to go into this subject on this post, but I want to blog about chemistry.

So, what is matter? In the most complex terms, matter is any material substance that occupies space, has mass, and is composed predominantly of atoms consisting of protons, neutrons, and electrons, that constitutes the observable universe, and that is interconvertible with energy.

In short, it is the “stuff” of which the universe is composed and has the two characteristics: it has mass and it occupies space.

To understand the nature of matter, it is classified in various ways. The three states of matter: solid, liquid, and gas are defined by:

-solid: rigid; has a fixed shape and volume

-liquid: has a definite volume but takes the shape of its container

-gas: has no fixed volume or shape; takes the shape and volume of its container

The state of a given sample of matter depends on the strength of the forces among the particles contained in the matter; the stronger these forces, the more rigid the matter.

Substances have physical properties. Typical physical properties of a substance include odor, color, volume, state (gas, liquid, solid), density, melting point, and boiling point. A pure substance can also be described in terms of its chemical properties, which refer to its ability to form new substances.

An example of a chemical change is wood burning in a fireplace, giving off heat and gases and leaving a residue of ashes. In this process, the wood is changed to several new substances. Other examples of chemical changes include the rusting of the steel in cars, the digestion of food in the stomach, and the growth of grass in the yard.

In a chemical change a given substance changes to a fundamentally different substance or substances.


Kinetics

I still need to suck out one hundred words…so let’s continue with chemistry into the study of kinetics.

Chemistry is far more complex than mixing “stuff” and seeing what happens. In fact, chemistry is known as the central science as it focuses and links many of the other branches of natural and physical sciences. Without chemistry, the complex nature of biological functions would be difficult to explain. It is needed to explain reactions and interactions with the physical world – and thus physics.

So what is kinetics?

Kinetics is a branch of science that deals with the effects of forces upon the emotion of material bodies or with changes in a physical or chemical system. In short, it studies the effects of reactions. It also deals with the mechanisms or vehicles by which a physical or chemical change is effected.