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The temperature of 500 ml of water in a beaker was measured before a warm heater connected to power supply was dipped in the beaker. After 10 minutes of heating and constant stirring of water, the power supply was switched off, and water temperature measured. The same procedure was repeated for a period of 15 minutes. The results were recorded in table 1.
The temperature of aluminium block was recorded before a heater connected to a power supply was used to heat the block for a period of 8 minutes. The above procedure was repeated using Copper block and the results were recorded in table 2.
The experimental specific heat capacity of water was 4785 JKg-1 oC-1 while the literature value was 4187 JKg-1 oC-1. Therefore, the percentage error for water was calculated using the formula: % Error= |Experimental value-Theoretical value| ×100
The specific heat capacity of water determined in this experiment had a numerical value of 4785 ± 263 JKg-1 oC-1 while that of aluminium and copper were 1278 and 545 JKg-1 oC-1, respectively. The standard (literature) specific heat capacities of water, aluminium and copper are 4187, 900 and 386 JKg-1 oC-1, respectively (Table of specific heats). The obtained values were more than the literature values. The anomalies observed between these values were probably due to random errors in the experimental procedures e.g. the loss of heat to the surrounding and the presence of impurities in the water hence leading to an increase in the boiling points. Systematic errors could be due to the weights of the metal blocks and temperature readings as well as fluctuations in pressure. In future experiments, loss of energy to the surroundings could be avoided by using more energy to heat the water for it to attain the required temperature. In addition, water with higher levels of purity can be used in the experiments so that the effect of impurities on
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The Results were obtained and tabulated in a table, which were later used in the calculations of the heat energy. The heat energy, which evolved as a result of the reaction, was calculated and the reaction enthalpies compared for the four acid-base reaction.
The objective of the experiment is to find out the specific heat capacity of water by monitoring change in temperature of a water that is heated to boiling under constant time interval.
The specific heat of any material determines the amount of energy needed to heat 1 kg of
The heat capacity is the amount of heat energy required to raise the temperature of a unit mass of an object by one degree. The specific heat capacity is the amount of heat energy needed to raise the temperature of one gram of material by one degree. Two objects
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The concluded experiment was not prospective as expected due to a higher error percentage. Brass recorded the grand percentage error of 32.42% whilst copper recorded the smallest percentage error of 8.03% only. Aluminum and Stainless Steel had percentages error of
little heat lost in the room is not considered and the 2 heat flows Q is required to be the same through energy conservation (Rane and Tandale 2003).There is application of heat transfer equations in the heat exchange equipment design in order to be done efficiently as well as
From the concentration of Phenanthroline and iron, moles of Fe in the complex = 0.00004 while those of Phenanthroline = 0.00008, therefore mole ratio is 1:2 therefore n value is 2. The experimental n value for Phenanthroline in Fe (II) is 2 while that of ferrozine is
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