Tim+J

[|http://www.youtube.com/watch?v=nXfErNXUKY]Wiki 4: Water [|l][|.com/h2phys.html] 3-5, [] 1-2. Water is a very unique substance because it can be found in all three states of matter. One physical property of water is that it's freezing point is 0 degrees celsius which is fairly similar to other molecules. Another is that the solid state of water, which is ice, is less dense than the liquid form which is not very common to other molecules. The molar mass of water is 18.015. Molar mass is the mass of one mole in a substance. Water's molar mass is low compared to other molecules. The molar volume of water is 55.5 moles/liters. Molar volume is the volume of one mole in a substance. It is similar to other molecules. The critical temperature of water is 647 Kelvin. The critical temperature is the temperature when a gas can not be turned into liquid anymore. Water's critical temperature is high compared to other substances. All these physical properties are some of the interesting properties of water.

Wiki 3: Greenhouse Gases The greenhouse effect is a very interesing subject. Global warming is considered to be a very good thing because if we did not have global warming the air would be very cold. The greenhouse effect works when the atmosphere emits and absorbs infrared radiation. Light strikes the earth which makes the surface hotter. When the infrared radiation is absorbed it is re-emitted usually back towards the earth's surface. Any molecule that vibrates and absorbs infrared is a potential greenhouse gas. Water, carbon dioxide, ozone, and nitrous oxide, are some of the greenhouse gases. Carbon dioxide is a big greenhouse gas. When people burn fossil fuels they are reloding the earth with a lot more carbon which can be bad. Right now scientists are trying to find ways to get some of the carbon out of thew atmosphere. During the global warming debate I have heard that global warming is causing the polar ice caps to melt. This is causing the sea level to rise which could lead to the possiblilty of flooding. Those ice caps are also mainly fresh water so global warming is taking the fresh water from the earth. I have also heard that global warming is causing climate change and strange weather patterns.

Wiki 5: Investigating Solubility and Immiscibility To clean up oil spills people usually use booms and akim the surface of the water since the oil stays by the top of the water. First they use booms which are long buyant objects with something like a skirt below the surface in between the booms which contains the oil so it does not spread to much. Then they skim the oil from the surface off the water using a a machine that can suck up the oil.

Solubility is the property of a \substance that can be dissolved in an amount of solute. Rate of dissolution is the amount of time it takes to break up the molecules parts. Temperature speeds up both concept because whenit gets hotter the molecules move faster so they break up easier. Stirring also affects both concepts by speeding them up also because when you stir you are hitting the particles and breaking them up. Surface area affects them because the larger the surface area the more the molecules can jump out. Surface area also increases solubility.

Wiki 6: Reaction Rates Concentration effects reaction rates because there are more particles. When there are more particles there are more collisions between them which causes the reaction rate to be faster.  [] Temperature is somewhat like concentration. When the temperature increases the number of collisions increases because they move faster. http://www.youtube.com/watch?v=t0xl0CXjB04

Catalysts also speed up reaction rates. They provide shortcuts in making the reaction rates faster then what they usually wouls be. []

Suface Area also speeds up the reaction rate because the particles are more spread out.

Wik 8: Equilibrium 2

1.The concenrations of the reactants and products remain constant with time because the rate of products and the rate of reactants are the same. The forward and reverse reactions are happening at the same time. THe consistany does not contradict with the reaction being dynamic because the reaction is still happening. 2. The equilibrium expression is a ratio of the concentrations of the products over the concentrations of the reactants. Solids and liquids are not used in the expression. H^2(g)+F^2(g)<->2HF--[HF]2/[H2]x[F2] N^2(g)+3H^2<->2HN(g)--[HN]2/[H2]x[N2] 2F^2(g)+2N^2(g)<->2FN^2-[FN2]^2/[F2]x[N2]

Wiki 9: 1. A concentrated solution is when there is a lot of solute disslolved compared to a little of the solvent. A dilute solution is where is a large amount of solvent and a little of the solute dissolved. 2. A strong acid reacts well with water and had a forward reaction and then a weak acid does not react well with water and is a reverse reaction.

Wiki 10:Biomolecules Carbohydrates are made up of sugars. Made of carbon, hydrogen, and oxygen. Carbohydrates are the main energy surce for the body. Two examples are glucose and maltose.

Proteins are made up of amino acids. Protein builds and repairs tissue in the body and protein helps fight off disease. Two example of protein are amino acids and hemoglobin.

Lipids are made of fats, oils, and glycerol Lipids help produce energy and control our vitamin and hormone usage. Two examples are steriods and wax.

Nucleic Acids are made up of sugar and phosphate. Nucleic acids store and transmit genetic information. Two examples are DNA and RNA.