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Lab report abstract on heat capacity of metals
Lab report to determine the specific heat capacity of a liquid
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Objective: The purpose of this lab was to calculate the specific heat of a metal cylinder Procedure: 1. The 100ml Graduated cylinder was filled with water and a rubber stopper. 2. The metal was placed in the Graduated cylinder, water displacement was found. 3. The beaker was filled with water and the metal was placed in the water. 4. The Bunsen burner was lit. 5. The water in the beaker was boiled using the Bunsen burner. 6. The Styrofoam cup was filled with approximately 100ml of water. 7. The temperature of the water in the Styrofoam cup was found. 8. The temperature of the boiling water was found. 9. The thermometer was cooled. The metal cylinder was removed from the boiling water and placed in the Styrofoam cup using tongs. The temperature of the water and the metal cylinder was measured. Theory: Theory of Water of Displacement: A volume of water was measured. A second volume of water was measured when the metal cylinder was added. The initial volume was subtracted from the second (total) volume to get the volume of the metal cylinder. D=M/V M=DV therefore: M=D(T-I) q=M½DT½Cp qgained=qlost qmetal=Mmetal(Ti-Tf)Cpmetal qH2O=(DH2OV)(Tf-Ti)CpH2O qmetal=qH2O therefore: Mmetal(Ti-Tf)Cpmetal=(DH2OV)(Tf-Ti)CpH2O CpH2O=4.
Thermodynamics is essentially how heat energy transfers from one substance to another. In “Joe Science vs. the Water Heater,” the temperature of water in a water heater must be found without measuring the water directly from the water heater. This problem was translated to the lab by providing heated water, fish bowl thermometers, styrofoam cups, and all other instruments found in the lab. The thermometer only reaches 45 degrees celsius; therefore, thermodynamic equations need to be applied in order to find the original temperature of the hot water. We also had access to deionized water that was approximately room temperature.
5. A second test tube was then filled with water and placed in a test
8. Put the closed flask into a water bath at room temperature in a 1 L beaker. Ensure that the entire flask is covered. If the flask begins to float, clamp it down. Put the temperature probe in the water bath. Using a pipet, add some boiling water from the hot plate to the water bath until the temperature of the water bath increases by 3 °C. Use the temperature probe to stir the water bath. Once pressure and temperature measurements stop changing, keep the data. Record the air pressure and vapor pressure for this temperature.
9. When all magnesium has reacted, remove the lid and heat strongly for 5 minutes
6. Place the test tube in the beaker. Secure the test tube and thermometer to the retort stand using clamps. Begin heating the water bath gently.
...inty between 1.0% (0.1/10.00*100) and 2.13% in the measured volume and 0.1/4.70*100). We also used a digital thermometer that allowed us to read the temperature readings from five degrees celcius to eighty degrees celcius. Since the digital thermometer have an absolute accuracy of plus or minus one degree celcius, it gives a percent uncertainty between 0.125 % (0.1 / 5.00 * 100) and 0.2 % (0.1/ 80.0 * 100). One of the difficulties we faced during the lab is reading the inverted graduated cylinder. To account for the inverse meniscus, we subtracted 0.2 mL from all the volumetric measurements to account for that. Volumetric uncertainty is the most important in determining the accuracy of this experiment since we are constantly checking for the volume throughout the lab. It also is the factor that gives the highest percent uncertainty out of all the instruments used.
Remove the metal object from the first beaker and insert it into the second one.
Obtain a sample of metal that has been immersed in boiling water and place it in the cup of water.
The purpose of the lab was to show the effect of temperature on the rate of
NOTE: The stirring rod was not used in the First and Second experiments, as it was not available. A substitute we used the thermometer.
On the top of the box we then created a circle so we can place a lamp inside but we also covered it with aluminum. Lastly, we placed the thermometer inside the box. For the experiment, we started the timer and we turned on the lamp. Each 30 seconds we would read what the temperature was and record it in our organizer. The temperature kept increasing as the 30 seconds kept increasing. Then eventually after 930 seconds, we turned the lamp off. Each 30 seconds we kept checking the temperature to see if the temperature would decrease as the lamp was turned off and there was heat loss. Our calculations were: a= 2(area of long sides aka l*h) + 2(area of short sides aka w*h) + 1(area of top aka l*w). Our final calculation was 2(17.5 * 9) + 2(9.25 * 9) + 1(17.5 * 9.25)= area. The final area of our house was 643.375 in squared. In the table for the heating cycle it shows the elapsed time (sec), the temperature in degrees fahrenheit and the delta T. In the table for the cooling cycle it shows the elapsed time (min), the temperature in degrees fahrenheit and the delta T. The graph shows the same thing as the tables. The Y axis is the temperature and the X axis is the
Part A of the experiment, we were measuring the density of water. In this part, we measured by difference by measuring the mass of the empty graduated cylinder which was 46.35 grams and then added 25.0 milliliters of water to it. When subtracting by difference, our mass of the water was 25.85 grams. This was close to the measurements of the water added to the graduated cylinder. The density of the water was 1.0 grams/milliliters.
6. I then rinsed out the beaker and glass rod into the flask to make