Research question Does changing the length of the carbon chain effect the heat of combustion of water when heated for 2 minutes? If so, which fuel reaches the highest temperature during that time? Aim To investigate the relationship between three different alkanols in terms of their carbon chain length, rate of increased temperature, and heat of combustion, in order to determine which is the most efficient at heating water to a certain temperature whilst reducing time and effects on the environment. Hypothesis If the length of the carbon chain within an alkanol is increased, then the heat of combustion will also increase due to a greater amount of intermolecular forces between molecules, as there are more carbon-hydrogen molecules being added to the homologous series. Thus the amount of energy required to break those bonds will be much higher, causing a greater amount of energy being released during the reaction. Therefore enhancing the mass of the hydrocarbon and change in enthalpy which will consequently increase the heat of combustion. Introduction It …show more content…
What this means for the reaction is that there isn’t as much bonds being produced which will ultimately affect the amount of energy released in the form of heat, thus decreasing the overall heat of combustion whilst also effecting the reliability of the calculations. There are four different types of hydrocarbons each having a different homologous series (formula for carbon chain). These being an alkane (formula = CnH2n+2), alkene (formula = CnH2n), alkyne (formula = CnH2n-2), and an alkanol which has the same formulae as an alkane only that is has a hydroxide molecule which replaces one of the hydrogen atoms (refer to figure 3 and
The burning of the materials is a complex process. Combustion of any material requires three components: heat, oxygen and combusting material or fuel. When heat is applied to the composites materials, temperature of the materials increases. At particular temperature, pyrolysis temperature, materials start to decompose, and produce
From working out how much fuel has been used, I can work out how much bond energy has been released from the molecules of the alcohol. From those results I will be able to say which alcohol is the best for combustion and which one is the worst to combust. A good fuel should produce a lot of heat energy and use a small amount of fuel. (economical) A bad fuel uses a lot of fuel and produces less heat energy.
XTL (Anything to Liquid) is recently emerging phrase that represented all of technologies intended to convert any source of carbon to liquid hydrocarbons. These processes have at least three main steps: syngas production, Fischer Tropsch Synthesis (FTS) and product finalizing. Syngas production might be different from feed and technology point of view and these differences affect all downstream units partially. In this step, source of carbon converted to syngas which is a mixture of hydrogen and carbon monoxide. Origin of the letter X in the XTL phrase depends on this carbon source since B stands for Biomass, C for Coal (bituminous or non-bituminous), G for (natural) Gas and W for Waste (petrochemical wastes, worn automobile tires and …) [1-4]. Amongst these routes steam reforming in fixed bed reformers and partial oxidation in auto thermal reactors are more attractive in industrial applications (both related to Gas to Liquid (GTL) process) [5]. Although these processes seem completely different form syngas production point of view but they are almost similar in the next step, the heart of any XTL factory, namely FTS. In FTS unit syngas converted to chains of different hydrocarbons such as paraffin, olefin, oxygenated and …, by use of sutiable catalysts of iron or cobalt based. This section is the most important section of any XTL factory and in fact XTL is translation of the classical Fischer Tropsch Synthesis the language of industrial and commercial world. Finally the hydrocarbon products might undergo some finalizing steps to reach the specifications of the market. This is the final step of a XTL process and might be comprised of different units with a variation of complexness depending on the final product quality and perhaps...
In summary, the results suggested that as the carbon chain increases in alcohols, the shorter the flame. The results also suggested that if the flame length increases, the enthalpy increases as well in a linear function. It can be said that the experiment that investigated whether the longer the carbon chain length would increase enthalpy is either invalid or not accurate. This can be the case as the theory should be correct as there are extra bonds that need to be broken which in turn will release more energy. Recommendation to improve the design to gather better results were made. Nevertheless, the experiment produced some results and provided further areas of research and
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.
This container must have a value of specific heat capacity so I can calculate heat transferred to it as well. Probably the most conductive container available for use in the classroom is a calorimeter. As well as not wasting energy on the heating of the container, I could also try to stop heat from escaping the top and edges of the container by covering it with a fitting lid. I will try to prevent the wind from blowing the flames in a different direction so all the windows must be shut. HYPOTHESIS More energy is released as more bonds are formed, below is the list of approximate energy required to break and form all bonds involved in burning alcohols.
Ulbig et al. [14] and [15] carried out precise measurements of heat generated when propylene glycol (PG), ethylene glycol (EG) and ethanol (ET) were diluted with water, respectively. Hubert et al. [16] showed heat absorption by infinite dilution of NaCl solution with water, and Khrenova et al. [17] showed heat absorption by infinite dilution of NaNO3 solution. Using these results, heat from mixing or dilution at 25 °C for each solution was approximated using a least squares method as follows, respectively:
Patch burning has a positive and negative affect on plants, medium sized animals, birds and preventing wildfires. Patch burning is helping plants by giving them more space and values the growth. The production of dryer plants can cause more fires then there already is. The dryer the area is, the more possible chance a fire could happen in that area.
Alternatives to CFCs - EasyChem - The Ultimate Resource for HSC Chemistry: Syllabus-Based Dot-Point Study Notes/Summaries, Past Exam Papers, and More. 2014. Alternatives to CFCs - EasyChem - The Ultimate Resource for HSC Chemistry: Syllabus-Based Dot-Point Study Notes/Summaries, Past Exam Papers, and More. [ONLINE] Available at:http://www.easychem.com.au/monitoring-and-management/the-atmosphere/alternatives-to-cfcs. [Accessed 26 April 2014].
The purpose of this project was to determine if algae would produce more energy than sunflower oil and canola oil. The hypothesis was that algae would produce more energy. The type of algae that was used for the experiment was chlorella. The project experiment involved growing algae in water which was placed under a carbon dioxide tank. The algae required a 12 hour light cycle per day to grow efficiently. Once grown, the algae was placed into a bomb calorimeter to measure the amount of heat energy it produces. Since there wasn’t a high quantity of algae, it was mixed in with sunflower oil. Subsequently, the sunflower oil and canola oil were also tested in the bomb calorimeter to measure the amount of heat energy they generate. The algae produced - 56.2670 kJ/g compared to sunflower oil producing -36.5578 kJ/g and canola oil producing -3.4893 kJ/g in the bomb calorimeter. This result confirms that the algae produces more than sunflower oil and canola oil.
The total enthalpy change for a petrol-ethanol fuel mixture was calculated by multiplying the percentage of ethanol in a sample by the enthalpy of combustion of pure ethanol and adding that value to the value obtained by multiplying the percentage of petrol by the enthalpy of combustion of pure petrol.
...sen burner, the oxygen gives more energy to the electrons in the flame, causing the flame to heat up more and more. Therefore, the chemical reaction of methane gas reacting with oxygen to produce carbon dioxide and water vapor is given off by the Bunsen burner. We can now understand that the yellow flame contains heat as a cause of the oxygen that was a part of the reaction, but to make the flame hotter, the percentage of oxygen being fed to the Bunsen burner must increase.
Temperature affects various processes in the water quality (ANZECC 1992). The rate of chemical reactions, for example, is activated when high water temperature occurs which causes evaporation of certain substances that may be present in the water. Also, as water temperature increases, the solubility rate of gases in water, such as oxygen (O2), decreases and respiration rates of aquatic organisms increases which results to greater oxygen consumption (Chapman and Kimstach 1992). A change in water temperature also causes greater destruction of aquatic life and problem of unwanted growth of water plants and wastewater fungus (Metcalf and Eddy 1991).
Methane is a chemical compound which has the chemical formula CH4. It is the main constituent of the natural gas (50% - 90%) and this is the reason why it is considered as a very important chemical compound in Qatar which depends economically on the exportation of natural gas. On the other hand it has many harmful effects on the earth such as global warming. Methane was discovered by Alessandro Volta in 1776 when he read some papers about flammable air which pushed him to study more about the gas in that phenomena. He noticed some the swamp gas bubbling from a lake next to his house from that moment he also discovered that it can be burned easily He called it “inflammable air from marshlands”, today we call it Methane.
The boiling process in many physical systems depends on many factors. For this study, the effect of adding other substances on the boiling process of water was determined. This was done through the comparison of the rate of the boiling process of water