(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.
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.
Tammy Thanaporn Amornkasemwong 1st September 2011 Science Period 8 Introduction: How much energy can be released from fuels? Combustion is the process of burning fuel in order to produce heat. The intention of this experiment is to find whether different fuels produce different amount of energy. In the process of combustion in this experiment, cheeto, half a cashew nut, wax candle and ethanol are used as fuels combust with lighter, as heat and oxygen. When the fuels combust, oxygen and fuels react, and heat released.
Fossil fuels like the substance sulfur dioxide products are burnt to heat water under pressure , making them steam. This high pressure steam is used to spin the turbine generators which make electricity although this method is not really used anymore now. 5.) What are the potential hazards for using this resource? The potential hazards for using sulfur dioxide is it can affect our environment, plants, animals, the air that we breathe, our water resources and our planet.
There was a low efficiency rate for this experiment; energy was most likely wasted into the surrounding environment when the burner was alight. Possible ways to improve this experiment would be to possibly do the experiment in a more enclosed space, so as to disallow any heat escaping into the surrounding atmosphere. A fume cupboard would be suitable (when it is not turned on) as there is less movement in the air to move the energy from its intended target. The thermal energy was not only going into the water, but the can of the calorimeter became hot too, meaning that the thermal energy was transferred into the metal surrounding the water, and not just the
Thermal runaway reaction- What is a thermal runaway reaction? Thermal runaway reactions happen when heat generation increases with the increase in temperature and may occur due to many factors, including lack of process control or lack of cooling. The rise in pressure can happen because due to vaporisation of some of the components of in reaction mass. [1] What causes thermal runaway reactions? Thermal runaway reaction occurs when the heat generated by a reaction goes beyond the heat removal caused by the available cooling capacity.
Both of these types of reactions can create either a hot or a cold pack, depending on whether heat is absorbed or released. An endothermic reaction is known to generate a cold pack because the heat and energy are absorbed from the environment while an exothermic reaction is known to produce a hot pack as a result of heat and energy being released to the atmosphere. This experiment is comprised of testing four different salts in order to see which ones will work the best for producing these hot and cold packs. These salts are ammonium nitrate, calcium chloride, lithium chloride, and potassium chloride. Not only will we determine which one is the most resourceful for creating these packs, but we will also consider how much it will cost to actually produce them for the Dystan Medical Supply Company.
Coal hypothesis = Coal will contaminate the water source making it more acidic. 2. Based on the results of your experiment, would you reject or accept each hypothesis that you produced in question 1? Explain how you determined this. a. Pyrite hypothesis accept/reject = Accept, because the pH level did rise within the 48 hour period during the experiment.
Name: Alexis Savastano How Does pH Affect an Enzyme? Catalase is an enzyme that helps decompose the toxic hydrogen peroxide that is produced during normal cell activities. The products of this reaction are water and oxygen gas. The pressure of the oxygen gas in a closed container increases as oxygen is produced. Any increase in the rate of reaction will cause an increase in the pressure of the oxygen.
Carbon dioxide is an significant contributor to the enhanced greenhouse effect. It can result in trapping more of the heat that Earth is radiating into space and cause detrimental climate changes and rising sea levels. The main concern regarding the combustion of organic compounds is the result of incomplete combustion. Incomplete combustion occurs when there is not enough oxygen to completely burn the fuel to carbon dioxide and water, causing pollution and fuel inefficiency. For example: Pentane reacts with little oxygen to form