(As you can guess, different fuels begin burning at different temperatures.) Heat or ignition sources lift fuel (combustible material) to its activation energy to start the fire. The fire generates heat which sustains the chemical reaction; the blaze continues and spreads. Some firefighting tactics shield the fuel from air (oxygen) to extinguish the blaze. Carbon dioxide fire extinguishers expel a cold fog of CO2 that cuts a fire off from its air supply.
Simple and Fractional Distillation of Cyclohexane and Toluene Purpose: The purpose of this experiment was to become familiar with the processes of simple and fractional distillation. In this experiment a mixture of two volatile compounds, cyclohexane and toluene, were separated with the process of distillation. Distillation relies on each compound having distinct and separate boiling points. The pure products were analyzed with gas chromatography to determine the success of the distillation. Introduction: Distillation is the process of heating a liquid until it boils, then condensing and collecting the resulting hot vapors.
Water is used in photosynthesis by plants, which produce oxygen - this reaction is vital for the earth as the oxygen produced is used by humans to breath Water is used in coal powered electricity stations. The coal is burned which boils the water. The water becomes steam, which turns the turbine, activating the generator, then producing the electricity. Because water can also exist as a vapor it can be stored into the atmosphere and be delivered as rain across the planet. Water makes up 90% of the earth’s atmosphere and the other 20% is land Our bodies are about 60 percent water [source: Mayo Clinic].
Then we just give the sample to TA in order to get the peak. 4. Result and Discussion Steam distillation is a special type of distillation especially for temperature sensitive materials. Many organic compounds, in this case, limonene, tend to decompose at high sustained temperatures. Steam is introduced to the distillation system.
Oxygen: B. Reacts the same as hydrogen with gas bubbles rising to the surface. F. I believe we fill the gas generator test tubes almost to the top with the chemical s to eliminate as much air as possible and to speed up the gas transfer to the pipet. 3. Hydrogen and Oxygen Mixture G. A balanced equation for the reaction between Hydrogen and Oxygen is 2H2 + O2 -- 2H2O Data Table: Experiment Results | Gas | Flame reaction | Glowing splint | Limewaterreaction | BromothymolBlue reaction | Hydrogen | Small Poof with flame, then blew flame out | | | | Oxygen | | Glowing splint flamed back up when inserted | | | Hydrogen & Oxygen | | | | | Carbon Dioxide | Puts the flame out | | Turns the limewater a milky color | Turned the blue water to a yellow color | Alka Seltzer | | | Increased the volume of the water/add CO2 | | Breath | | | I saw no reaction | | Questions: Questions: A. We fill the gas generator tubes almost to the top to eliminate as much air as possible and speed up the gas transfer to the pipet.
During the process of TIG welding, an arc is formed between a pointed tungsten electrode and the area to be welded. As a result of the gas shield, a clean weld is formed. This prevents oxidization from occurring. The arc is started with a tungsten electrode shielded by inert gas and filler rod is fed into the weld puddle separately. A slower process than MIG, it produces a more precise weld and can be used at lower amperages for thinner metal and can be used on exotic metals.
4. The products of a burning candle are carbon dioxide and water. 5. wax(vapor) + oxygencarbon dioxide + water Reactants Products Conclusion: From this lab, I learned that wax burns in a vapor state. Fire requires fuel and oxygen in order to burn. The products of a combustion reaction are carbon dioxide and water.
This can be done by placing the sample on the table top and dabbing the end of the metal wire with the loop filled with water on the sample. Once the sample of Sodium Chloride has been successfully placed on the end of the wire, turn on the Bunsen burner and slowly and carefully place the end with the sample into the flame, be sure at this point you are wearing proper safety gear such as lab goggles and gloves to prevent any eye damage, skin irritation, or burns. Observe the color that is produced when the
*Note: The volume of gas generated in the actual lab will contain water vapor in addition to hydrogen gas. In addition, there will be a vacuum that is created by the downward pressure due to the difference in water level in the graduated cylinder and in the water basin. This will cause a negligible increase in the volume compared to