Chemical reactions

There are six chemical reactions.

Combustion is when oxygen combines with another compound to create water and carbon dioxide, this reaction is considered to be exothermic which simply means that this reaction creates heat.

Synthesis this reaction is when two or more simple compounds come together in order to create a complicated compound.

Decomposition is the complete opposite of synthesis, this occurs when a molecule that is complex breaks down into simpler molecules.

Single displacement is when one element trades places with another element while in a compound.

Double displacement is when the anions and cations of two different molecules switch places, which then turns into two complete different compounds.

Acid-Base is a certain kind of double displacement reaction that happens when a acid and base react with one another. The H+ion in the acid reacts with the OH ion in the base.

Some experiments that have been conducted by us are mixing potassium promaginite and glycerin that causes an exothermic reaction. Based on the six different types of Chemical reactions which type of chemical reaction does this experiment give?

Another experiment example: Sodium and water in chlorine gas which produces a lot of heat but it also turns into sodium chloride which is just common salt. What reaction does it give?

A third example is when Helium is cooled to -271 degrees Celsius. It is called lambda point. Once it hits this point it is considered helium II or helium superfluid.

What reaction is this?

http://edtech2.boisestate.edu/halej/573/jigsaw2.html

 http://antoine.frostburg.edu/chem/senese/101/thermo/faq/exothermic-endothermic-examples.shtml

Things that affect Reaction are

AGITATION:  Anything that cause particles to move, shaking and stirring are actions that result in  the movement of particles. This leads to more collisions, and a higher reaction rate.

CATALYST: Is something that helps initiate a reaction, but isn't considered a reactant or a product. It increases the rate at which chemical reactions can occur. The catalyst is not depleted during the reaction. 

CONCENTRATION:

When there are more particles in a given volume, the amount of times these particles will collide is greater when the are less particles. The more  particles/less space per volume, the faster the reaction will occur.

PRESSURE: The higher the pressure there is on a container, the lower the volume will be (less space, which leads to more collision and more often), which will also increase the speed of the reaction.

SURFACE AREA:  The amount of particles found on the surface of that are open to collision.  Larger objects have surfaces with particles that are less exposed, which means fewer collisions.  Objects that are smaller have more particles in contact with a surface, which would allow for more collisions to occur.  Chemical reactions occur at a higher rate when their reactants cover more surface area.