Biofuels FOrmal Lab report

Biofuels FOrmal Lab report - Athavale 1 Priyanka Athavale...

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Athavale 1 Priyanka Athavale 11/31/10 Chem 1A Lab Section 320 GSI: Sara Samiphak Biofuels: Synthesis and Combustion Abstract: The experiment was divided into three sub-experiments with the overall goal of determining the heat of combustion of biodiesel in the lab. The exotoxicity of the biofuels was assessed by their effects on the germination of radish seeds at different concentrations. The data showed that the most toxic fuel is 2-butanol. Then, the biodiesel was synthesized by the reaction of soybean oil and methanol. A calorimeter was used to find the heat of combustion, giving us the experimental value of 11,307 kJ/mol. The relevant fuels were further compared in the analysis, using heats of combustion. Introduction: This experiment was divided into three parts consisting of: estimating the toxicity of various biofuels, synthesizing the biodiesel, and understanding the heat of combustion of the biodiesel. The first part seeks to understand the exotoxicity of biofuels using a germination assay on radish seeds. In this part, the effects of various concentrations of fuels such as ethanol, biodiesel, 2-butanol, and methanol on the growth of radish seeds was observed. The second part synthesizes biodiesel from the reaction of soybean oil and methanol, in the presence of sodium hydroxide, producing methyl linoleate (the biodiesel) and glycerol. The final part of the experiment, the biodiesel is separated from the glycerol and is burned under a calirometer in order to find the heats of combustion. In other words, we measured the number of grams of biodiesel that have burned in order to raise the temperature of water by 10 degreed Celsius. Using a caliromter is an efficient way to measure heat of combustion because it allows for a temperature change in water to be measured. In addition, the experiment is being carried out at standard conditions of room temperature and one atmosphere of temperature, we can use the specific heat of water. By measuring the change in the mass of the biodiesel that has been burned
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Athavale 2 and multiplying that by the molar mass of the biodiesel, we get the moles of biodiesel burned. Knowing the number of moles, temperature change, and specific heat of water, we can calculate
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This note was uploaded on 02/12/2011 for the course CHEM 1A taught by Professor Nitsche during the Spring '08 term at Berkeley.

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Biofuels FOrmal Lab report - Athavale 1 Priyanka Athavale...

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