Conclusion The hypothesis for the glow sticks in different temperature experiment was accepted. The data used for the experiment that supports my hypothesis was that the glow stick in the glass cup filled with two hundred thirty-five milliliters of filtered cold water illuminated the longest. This glow stick in the cold water lasted on average of all three trials for ten hours and thirty-six minutes. The cold glow stick lasted three hundred and sixty-six more minutes compared to the lowest lasting time of which the hot water glow stick lasted. On average the hot water lasted four hours and nineteen minutes, and the room temperature glow stick lasted eight hours and fifty-seven minutes. I think the cold water lasted the longest because molecules move slow in cold water, causing it to slow the reaction down which made it last longer. In this experiment the outside factor might have been the color of the glow sticks which was pink. This may have also had an effect of how long …show more content…
One problem I faced was when the cheap thermometers stopped working in trial one, but luckily there were backups. While half way through the experiment, I came up with a better and shorter idea of a project. Instead of having to see how long the glow stick last in different temperatures I could see which glow stick glows the brightest after a short period of time. After an hour or so goes by I could look at each glow stick in the different temperatures individually and rank one out of ten how bright the glow stick is. However, seeing glow sticks in different temperatures and which glow stick last the longest is still a very useful experiment. People can now improve this product just by looking at the results of this project. Perhaps if this fact of glow sticks glowing longer in a colder atmosphere can be spread around the world, people can use it for the benefit of a long lasting glow
First, 100 mL of regular deionized water was measured using a 100 mL graduated cylinder. This water was then poured into the styrofoam cup that will be used to gather the hot water later. The water level was then marked using a pen on the inside of the cup. The water was then dumped out, and the cup was dried. Next, 100 mL of regular deionized water was measured using a 100 mL graduated cylinder, and the fish tank thermometer was placed in the water. Once the temperature was stabilizing in the graduated cylinder, the marked styrofoam cup was filled to the mark with hot water. Quickly, the temperature of the regular water was recorded immediately before it was poured into the styrofoam cup. The regular/hot water was mixed for a couple seconds, and the fish tank thermometer was then submerged into the water. After approximately 30 seconds, the temperature of the mixture leveled out, and was recorded. This was repeated three
The purpose of this lab was to calculate the specific heat of a metal cylinder
Glow sticks were first made in the 1960s when a scientist, Edwin Chandross tried to copy fireflies. He thought it was fascinating how they gave off a natural light. He made the first glow stick from oxalyl chloride and hydrogen peroxide. Since Edwin’s invention many scientist after made improvements to the invention. The United States Navy worked on creating glow sticks independently and received a patent in 1973. Glow sticks started to become popular in the 1980s and since then are still very popular today. The largest glow stick was made in 2009 and was 8ft 4 inches tall. Glow sticks can be used for entertainment when dancing they are very popular for raves, parties, night clubbing, special events etc. glow sticks are the safest light sources in emergencies, They are used because they are very efficient and do not require any batteries or electricity. Glow sticks are portable and waterproof can bear high pressure situations and that is why military forces and campers use them and have them on hand.
To continue the experiment further I can use a different source of light to test the intensity of light. For the food coloring experiment, I could use a different food color such as yellow or orange to test.
Light sticks work in a similar way. When you “snap” a light stick, the chemical in the glass capsule mixes with a chemical in the plastic tube and creates light energy. Instead of the chemicals used by a firefly, other chemicals are used to create a glow. The light stick that you can buy at a store usually contains hydrogen peroxide, phenyl oxalate ester, and fluorescent dye (New York Times Company, 1 of 3). The light stick will glow the same color as the fluorescent dye placed in it. In luminescence, the chemical reaction “kicks an electron of an atom out of its ‘ground’ (lowest-energy) state into an ‘excited’ (higher-energy) state, then the electron give back the energy in the form of light so it can fall back to it’s ‘ground’ state (Fluorescent Mineral Society, 1 of 2).
on how long it takes to heat up. If we heat a large volume of water it
Two electrical wires * Stopwatch * Thermometer Method I put a piece of Elodea Canadensis (pond weed) in a test tube and covered it with water. The test tube was then placed in a beaker with a thermometer so that the water stayed the same temperature, this was then placed in a cardboard box with a bulb attached to a voltmeter by the electrical wires so that I could concentrate how much light the plant got. I varied the voltage (intensity) of the bulb and counted how many bubbles of oxygen were created at each voltage in one minute. I tested each voltage three times for accuracy for a minute each time. Results Preliminary Experiment Amount of bubbles Light intensity (lux)
Whilst doing the experiment there are many things that will have to remain the same in order to keep the tests fair, these include amounts and measurements as well as concentration and size and shape of the magnesium e.g. long strands. The temperature how ever will be the main change in the experiment, this is the only factor to change in less problems occur where a change is not optional. For each temperature the test will be taken three times to make sure that the results are correct and as accurate as possible, an average will be taken to give a clear and single result. A diagram of the apparatus I intend on using and how it will be assembled; [IMAGE] Safety- To ensure that the investigation is safe I will make sure that all equipment it correctly assembled, and I am wearing the appropriate safety wear and that everybody around is either dressed correctly or far enough away.
The porpoise of these is to determine the Specific Heat. Also known as Heat Capacity, the specific heat is the amount of the Heat Per Unit mass required to raise the temperature by one degree Celsius. The relationship between heat and temperature changed is usually expected in the form shown. The relationship does not apply if a phase change is encountered because the heat added or removed during a phase change does not change the temperature.
the water baths I think were accurate enough but having two thermometers in each bath maybe would have helped to hold the temperature readings more accurately. We were not given any instructions either to shake or not to shake the test tubes with the coloured solutions before inserting them in the spectrophotometer to read the absorbance. By shaking each test tube a certain number of times before putting it in the spectrophotometer could have improved the accuracy of the absorbance of the solutions.
Take the cardboard cover and place it on top of the two Styrofoam cups, place a thermometer through the small hole in the cardboard cover. This creates a calorimeter. Take the calorimeter and place it into a small beaker to prevent it from falling over.
The purpose of the lab was to show the effect of temperature on the rate of
In a 100ml beaker 30mls of water was placed the temperature of the water was recorded. 1 teaspoon of Ammonium Nitrate was added to the water and stirred until dissolved. The temperature was then recorded again. This was to see the difference between the initial temperature and the final temperature.
During the experiment I will be taking a number of measurements, I will firstly take the initial temperature of the water and initial mass of the alcohol I will then burn the alcohol until an increase in temperature of 20oc has occurred in the water I will then reweigh the alcohol.
Hypothesis: If a test tube filled with 3% hydrogen peroxide and catalase solution, the room temperature will increase the activity. Freezer, refrigerator, and boiling water will have