Chemical Nomenclature

Chemical Nomenclature is the term given to the naming of compounds. Let's focus primarily on the forming of ionic compounds. Generally, and ionic compound forms when a metal and a non-metal are combined.

Liquid Nigrogen

Liquid nitrogen is nothing short of its name; the liquid state of the element nitrogen. The coumpound can be found in the atmosphere under temperatures of 63 K and 77.2 K (-346 F and 320.44 F). Below 63 K, nitrogen freezes into a solid; under 77.2 K, nitrogen becomes a gas.

It is normally obtained from the attmosphere thus making it inexpensive and therefore is rarely refrigerated. Liquid nitrogen is stored in containers known as Dewars and is left to boil away. Since it boils, Laboratories have liquid nitrogen that has been shown to have temperatures of 77.2 K. Liquid nitrogen looks like boiling water, but it is extremely cold; it can be very dangerous to a human when in direct contact but it can be very usefull in science.

Reference: http://education.jlab.org/qa/liquidnitrogen_01.html

How an Engine Works

· Different types of engines
o Diesel
o Gas turbine engines
o Internal combustion engines
§ Gas is burned on the inside
§ The main idea/theory
· If you put a high power fuel (gasoline) in a small confined space, massive energy will emit by expanding gas.
o If you can create a cycle of this hundreds of times a minute, you have the core of a car engine.
§ Almost all cars use the four stroke combustion cycle
· Think of a potato gun. Now, replace the potato with a piston.
o The piston is connected to the crankshaft by a connecting rod
§ As the crankshaft revolves, it has the effect of “resetting the cannon”
o Intake stroke
§ The piston starts at the top, the intake valve opens, and the piston drops
· This allows the engine to take in a cylinder full of air and gasoline.
· This is the Intake stroke
· Only a tiny amount of gasoline is needed
o Compression stroke
§ The piston moves back up to compress the air/fuel
· Compression makes the explosion more powerful
o Combustion stroke
§ The spark plug emits a spark, lighting the gasoline
· The gasoline charge explodes, driving the piston down
o Exhaust stroke
§ Once the piston hits the bottom, the exhaust valve opens and the exhaust leaves the tailpipe.
· Now the engine is ready for its next cycle, so it repeats over and over again.
§ Parts of the engine
· Cylinder
o The core of the engine is the cylinder
o Pistons move up and down inside
o The above is a single cylinder, common in a lawn mower
o Most cars are 4, 6, or 8 cylinder
§ The higher the cylinder, the better performance
o Types of cylinder formation
§ L (line) formed in a line
§ V (angled) Shaped like a V
· Spark plug
o Provides the spark in the air/fuel compression
o Must spark at just the right time for proper function
· Valves
o Open and close for the intake stroke and for exhaust excretion
· Piston
o The grey shapes in the above pictures.
o Move up and down in the cylinder
· Piston rings
o Provides a sliding seal between the piston and cylinder.
o Provides two major purposes
§ Prevent excretion of the fuel/air mixture during compression and combustion strokes
§ Keep oil out of the space in the cylinder
· Connecting Rod
o Connects the piston to the crankshaft
o Can rotate at both ends so that piston can move and the crankshaft can rotate
· Crankshaft
o Works like a Jack-in-the-box, only the clown is the piston
· Sump
o Surrounds the crankshaft, containing oil
§ Oil used to lubricate and minimize temperature of the entire cycle
o Steam engines
§ External combustion engine

Dipropylene Glycol

Sodium Stearate

Resource: http://en.wikipedia.org/wiki/Sodium_stearate

What the heck is sodium stearate?? Well, it is obviously a chemical. It is the sodium salt of stearic acid. The appearance of this salt is a white solid. The melting point is around 240 to 255 C. It is soluble in water. The salt itself is made up of carbon, hydrogen, oxygen, and sodium. The molecular formula is specifically C18H35NaO2.

This article is good for basic finds of sodium stearate and it's uses. The real life applications of sodium stearate is from soaps to food additives. One of the most common uses of sodium stearate is in soap. THe salt has both hydrophili and hydrophobic parts. It provides a formation of micelles, it basically provides a lipophilic environment for hydrophobic compounds. It can also be used in the pharmaceutical industry as a surfactant to aid the sulubility of hydrophobic compounds in production of many mouth foams. One of the uses I found in looking into sodium stearate is in deodorant stick products. It takes it's role by cleaning off the oils on the body. Sodium stearate is a common ingredient in many cosmetic products and possibly even food.