Comparing The Heat Combustion Of Different Fuels

An Investigation into the Enthalpies of the Combustion of Alcohols = == == == ==

Because it is dangerous to burn magnesium, it is not possible to directly record heat change. Our lab team suggests an indirect way of determining the heat of combustion for magnesium. To accomplish this, we need to perform two separate trials. One uses a solid (powder) version of MgO, while the other uses Mg ribbon. With the results from these, we can use Hess’ Law to determine q=∆H. This provides both a safe and successful way of indirectly determining the heat of combustion for magnesium.

Currently fossil fuels are the world’s primary energy source. The fossil fuels include coal, petroleum, and natural gases. Fossil fuels are organic materials formed from decayed plants and animals that due to heat and pressure from hundreds of

It was desired to compare a theoretical value of enthalpy of combustion to a literature value. To do this, the theoretical value was calculated using a literature value for the heat of sublimation of naphthalene, the heat of vaporization of water and average bond energies, given in Table 1 of the lab packet.1 Equations (1) and (5) were used to calculate the theoretical enthalpy of combustion of gaseous naphthalene, where n was the number of moles, m was the number of bonds, and ΔH was the average bond energy:

From the data analysed, a clear trend is seen. As the amount of carbon chains (and consequently molar mass) increases, so does the heat of combustion released. The hypothesis was stated as: “because 1-hexanol has more carbon bonds, it will produce the most amount of heat in the shortest period of time. By following the same reasoning, it is suggested that 1-hexanol will be followed by 1-pentanol and 1-butanol, respectively.” The experimental values show there is a linear relationship between the carbon chains and molecular weight, and the heat of combustion

Although oxidation is the end process of combustion, the same is not true for oxidation. After complex chemical reactions, combustion is paired with an exothermic reaction. Enthalpy in the form of heat is created during this process. “The rate or speed at which the reactants combine is high, in part because of the nature of the chemical reaction itself and in part because more energy is generated than can escape into the surrounding medium, with the result that the temperature of the reactants is raised to accelerate the reaction even

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The father reported that the reason for the evaluation is because the parents are unable to come to an agreement regarding custody of Sofia.

In the United States and other countries, they have different fuels that people use in gas or electric. People use these fuels for the cars, help get the house warm and people use warm water to take a shower. The warm water using to wash clothes. Also, we use heat to dry our clothes in the dryer. In this paper, I am going to write about primary sources of fuels and what the similarities and difference in the fuel sources. Also, I am going how the fuel cause problems and the United States and countries can stop pollution.

When Pentane (C5H12) has a combustion reaction it will have the highest heat of combustion of the three fuels selected, it has the biggest difference of the sum of energy to breaks bonds and to form bonds. This is because it has the longest carbon chain out of Pentane, 1-Propanol and 2-Propanol which gives it the potential to form much bonds and have the most energy when it is combusted and will release the most energy. Despite being dangerous pentane will be

For instance, pentan-1-ol, the alcohol utilised to synthesis 1-pentyl ethanoate, is relatively flammable due to the hydroxyl functional group attached to the molecule. Therefore, in order to prevent severe burns, a laboratory coat and safety glasses were worn. The experiment was additionally performed whilst standing up, so that if the aliquot of pentan-1-ol ignited,

overall, the investigation showed a positive correlation between the increase of carbon number in the linear alcohol homologous series, and the increase in enthalpy of combustion, which supports my hypothesis. Thus with the investigation of this experiment, it is to be concluded that, ignoring the cost of production, the more carbon in a alcohol, the more energy is released from the combustion of the molecule with oxygen.

Mass of water x 4.2 (water’s specific heat capacity) x temperature change = energy transferred from the fuel to the water

These fuels can consist of various types, such as natural gas, coal, wood, charcoal, oil, propane and kerosene.

The aim of this experiment was to test the heat of combustion over a period of time, and the energy required to combust alcohols with different carbon chain levels. It was hypothesised that the higher the carbon chain of the alcohol present, the faster the heat of combustion will occur. Meaning more energy will be released for a higher carbon chain. After calculating the results from the experiment it was found that the hypothesis was partially supported. The reasoning for this is as the alcohol that posses a higher carbon chain, generally increased there reaction rates. However there were a few exceptions to this rule.