Data Collection and Processing
Qualitative
The temperature of the water inside the calorimeter decreases after the melting period
The volume of water inside the calorimeter increases after the ice fully melted.
Quantitative
Mass of inner cup = (45.70 ± 0.01) g Trial 1
Mass of inner cup + water = (107.26 ± 0.01) g
Initial temperature of water = ( 30.0 ± 0.5) °C
Final mass of inner cup + water = (114.03 ± 0.01) g
Temperature of water after melting of ice = ( 21.0 ± 0.5) °C
Trial 2
Mass of inner cup + water = (108.25 ± 0.01) g
Initial temperature of water = ( 31.5 ± 0.5) °C
Final mass of inner cup + water after melting of ice = (117.03 ± 0.01) g
Temperature of water after melting of ice = ( 20.0 ± 0.5) °C
*Table 1 :* Processed data of the experiment
Sample calculations involved are as shown below:
= 6.77 g
Uncertainty of mass of ice = 0.01 + 0.01 Trial 1 :
(0.06156)(4200)(9) = (0.00677) l
_ l = 343.717 kJ_ kg-1
Uncertainty :
Trial 2 :
(0.06255)(4200)(11.5) = (0.00878) l
_ l = _344.096 kJ kg-1
= 100% – ( Experimental valueTheoretical value×100 )
= 100 % – ( 60434200×100 )
= 44 %
The Essay on Copper Sulfate Crucible Water Mass
Percent Composition Of Water In Copper SUlfate Pentahydrate (Lab Report Version) Abstract The percentage of water in Copper Sulfate Pentahydrate was found. Copper Sulfate was heated in a crucible to evaporate the water. The mass was weighed to find the difference before and after heating. By comparing these masses, the percentage of water was found. The percentage of water was found to be 34%. ...
RESEARCH QUESTION :
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TEACHER’S PROMPT :
CONCLUSION AND EVALUATION
specific heat capacity is commonly defined as the amount of heat energy required to increase the temperature of 1 kg of substance by one degrees Celsius or one Kelvin. In this experiment however, the specific heat capacity of water is required to be calculated. Water is known to be a very good cooling agent mainly because of its high specific heat capacity and the ability to absorb and irradiate great amounts of heat without increasing the temperature of it. Conversely, needing a high amount of energy to enter or leave the system to increase its temperature. The equation that is used in the experiment conducted is shown below:
Q = m c θ
Where ; Q = amount of heat energy supplied
m = mass of water
Apart from this, there seemed to be another aspect of the experiment that was neglected in the calculation of the specific heat capacity of water. The total energy supplied to the water is the total electrical energy supplied subtracted by the heat energy absorbed by the copper calorimeter according to the equation below :
Ecalorimeter + EH20 = V I t
Discussion :
Application of specific heat capacity in daily life :
Cooling system in a car engine Water has a high specific heat capacity and low cost. Therefore water is useful as it can be utilized as a cooling agent. A water pump circulates the water and the heat produced by the engine is absorbed by the water that flows along the spaces in the engine walls. The hot water then flows to the radiator where the heat is released to the cooler air that is flowing through the cooling fans.
Sea breeze The land has a lower specific heat capacity than sea water. Therefore the increase in temperature is faster for land compared to the sea making the land warmer than the sea. Air which is above the land is heated up and it rises. Cooler air from the sea then moves towards the land as sea breeze.
The Essay on From Water To Land
From Water to Land (Revision) Abstract: The early tetrapods were the first vertebrates to actually walk the solid earth. They began their conquest of land in the Paleozoic era around 360 million years ago. The question many paleontologists have been asking for a long period of time is whether the anatomy for locomotion on land was developed in water for swimming purposes, or if it was adapted ...
Land breeze At night, heat is lost from the land and the sea. Since the sea water has a larger specific heat capacity compare to the land, the sea is hotter than the land as it takes more time for the temperature of sea water to decrease. Hot air which is above the sea rises. Cooler air from the land then moves towards the sea as land breeze.
