How much energy is produced when burning five alcohols
· Methanol
· Ethanol,
· Propanol,
· Butanol
· Pentanol.
The aim is to find out how much energy is produced when burning these alcohols. The reaction that is involved in burning alcohols is exothermic because heat is given out. Form this reason the reactant energy is higher than that of the product.
The energy is given out when forming the bonds between the new water and carbon dioxide molecules. The amount of energy produced by such exothermic reactions can be calculated by using the formula :
Mass of the substance x rise in temp x SHC( specific heat capacity).
The specific heat capacity is the number of joules required to heat one gram of water by 1ºC. I chose to use water because it is safe, easily found, and has a reliable specific heat capacity of 4.2.
The bond that are formed in an exothermic reaction can be of two types. The first could be ionic, where a metal is produced. Ionic bonding involves electrons transferring from one atom to the other consequently leaving an electrostatic force between them. The other form of bonding is covalent where atoms share electrons to complete their outer orbit. An example being Methane where four hydrogen atoms each share an electron with a carbon atom.
GRAPH
Alcohol
The method that I will use is as follows:
· Measure 100cm of water in to a glass beaker
· Place the beaker into the grasp of the clamp stand.
· Record the starting temperature of the water
· Weigh the spirit burner with the lid on.
· Put the chosen alcohol burner under the beaker allowing the flame to just touch the beaker.
· Leave to heat up until the temperature of the water is exactly 50ºC more than the original temperatur...
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...nother error is that of incomplete combustion. Complete combustion occurs if there are lots of oxygen atoms available when the fuel burns, then you get carbon dioxide (carbons atoms bond with two oxygen atoms). If there is a limited supply of oxygen then you get carbon monoxide
(each carbon atom can only bond with one oxygen atom). This is when incomplete combustion has occurred. This is so because the carbon monoxide could react some more to make carbon dioxide. If the oxygen supply is very limited then you get some atoms of carbon released before they can bond with any oxygen atoms. This is what we call soot.
Since heat is given out when bonds form, less energy is given out by incomplete combustion. So this is why it affects the outcome of the experiment. To overcome this problem, I would have to make sure a sufficient supply of oxygen was involved in the reaction.
Each subsequent trial will use one gram more. 2.Put baking soda into reaction vessel. 3.Measure 40 mL vinegar. 4.Completely fill 1000 mL graduated cylinder with water.
the ones that contains ppt in half, then add 6M NH3 to one set of them
The Five Hour Energy Supply The small drink that promises energy and alertness without jitters plays a role in most teenage and adult lives. This 5- Hour Energy’s audience is multitasking, working professionals. Market demand has increased a tremendous amount since the product hit the store shelves in the year 2004. Each bottle contains high doses of vitamin B, caffeine, and energy blend.
I blanked it with 2 cm³ water, 1 cm³ amylase and 3 drops of iodine.
used during the combustion. I can now light it and let it burn. I will
In “Barn Burning” the setting is a time when people drove horse wagons and the workingmen were generally farmers. The major character in this story is Colonel Sartoris Snopes, called “Sarty” by his family who is a ten-year-old boy. In the beginning, Sarty is portrayed as a confused and frightened young boy. He is in despair over the burden of doing the right thing or sticking by his family, as his father states,” You got to learn to stick to your own blood or you ain’t going to have any blood to stick to you.”
amounts of fat in the food on the amount of energy per gram or 100
C - H O - H O = C = O O = O H - H
Investigation to Find the Relative Energy Release of Five Alcohols: Ethanol, Methanol, Propanol, Butanol and Propanol
Investigation of the heat energy produced by combustion of various alcohols. Aim: ---- To investigate how different alcohols produce different amounts of heat energy through combustion. I will be heating water using different alcohols as fuels and measuring the amount of fuel consumed.
Investigating Factors Affecting the Heat of Combustion of Alcohols PLANNING SECTION Introduction ------------ Alcohols are organic substances, and consist of Hydrogen, Oxygen and Carbon. All alcohols are toxic but the amount that can be tolerated by the human body varies for different alcohols. For example drinking small amounts of Methanol can lead to blindness and even death.
In this experiment I plan to use 1/500 of a mole. This is because if
In a 100ml beaker place 50mls of water, measure the temperature of the water and record this initial temperature onto a table. Set the timer and add one teaspoon of Ammonium Nitrate to the water, stir this continuously until the Ammonium Nitrate has dissolved.
of Copper Sulphate. To do this I plan to work out the amount of water
5) Warm water (just slightly warm to the touch), enough for each child to have 1 cup