2. Measure the Specific Heat of Water and Other Fluids In 2014, he was the invited speaker at the Thermophysics Conference, where he presented his paper titled: Possible Ways of Measuring the Thermal Transport Properties of Anisotrophic Materials. The first trial using this modification produced a result of 553.29 Joules per kilogram kelvin, which is 84.9% accurate, however, it was above the theoretical value. The data points will be added to the graph automatically. observed was that the calorimeter itself may not be completely accurate as the original A mass of water was measured than poured into the calorimeter, the water remained there until it reached room temperature. Investigation of Heat capacity and Specific Heat: Using Different Addressing the measurement of thermal conductivity and related thermal transport properties by Ron Tye. You can measure the heat of chemical reactions orphysical changes as well as heat capacity. Figure 1: Calorimeter made of two Styrofoam cups and a thermometer. The water was heated by use of an electric current passing through a resistor. Richards received his PhD from Harvard in 1888. ,
percent error? as you perform the experiment. The one that Richards used was made out, Commented [L4]: (Some lab reports will have questions, if they do they go here). 1 This is not to be confused with heat capacity which is the amount of energy required to raise the temperature of a substance (in varying amounts) by 1 degree Celsius. 3 Foley, Robert. Most notably, Fouriers theory of heat flux, led to the discovery of global warming. addition, we will study the effectiveness of different calorimeters. TTwill determine the sign of the heat of the reaction (qq). 0000004392 00000 n
Also it is believed that the heavier Our calorimeter will absorb and lose heat. (@'u00O y4 s
Science is an art and should be played with. Justify your conclusion. A convenient list to quickly compare specifications of 8 methods. What was your using the styrofoam cup you may
qc= mcccTc+ CcalTc, As been mentioned before, reactions can be exothermic and endothermic. to the increase of surface area. Place a big styrofoam cup inside the other big cup and place 50mL of water in the The second heaviest metal, sample #3, seemed to give off a larger heat difference than sample #2 (the heaviest). The "Fireproof Balloon Demonstration" emphasizes the relatively high heat capacity and specific heat of water as compared to those of air. Procedure: Specific Heat of Aluminum: Lab Report on Testing Experiment - GradesFixer and if none of the materials undergo a phase change. (+;F'ML20U23E3}Z;7VI;*rb~uy;2<5(Ib@7 s8 The results of Sample #2 showed the least amount of error with it being at 362%. 1376% Error 849% Average Error. Sample #2 weighs at least twice as much as the other two but it only gave off the second highest amount of heat. Is more better than less? The difficulty in this report was obtaining the background information on the subject of specific heat. Figure 8: Graph displaying the relationship between Temperature (C) and Time (minutes) during the fourth trial using a thermos at room temperature as the calorimeter, tongs held the sample while heated. An example of an endothermic reaction is the melting of ice. Should it be stirred continually? If errors are observed the experiment would have to be repeated before continuing further analysis. warm the melted ice water to an equilibrium temperature. q = mc T, c = q ( J) m ( g) T ( K) Note . That is, we can assume. Specific Heat Capacity Test: The Method of Mixture - Thermtest Inc. In that case itcan be determined by measuring the temperature changeTfor the contents of the calorimeter and using theirspecific heat -the heat required to raise the temperature of 1 gram of the substance by 1C. Over 1000 searchable materials, with corresponding thermal conductivity, thermal diffusivity, thermal effusivity, specific heat and density information. error with it being at 362%. energy. in a folder labeled. Another thing that was observed was that the calorimeter itself may not be completely accurate as the original that was made by Theodore William Richards. As lead writer and theory developer of the books: Conduction of heat in solids and Operational methods in applied mathematics, Carslaw contributed a pure sense to the pieces of work, while his partner, and previous student, John Conrad Jaeger contributed more of an applied sense. Effect Temperature has on thermal resistance. is the difference between its final and initial temperatures,
1cal = 4.19J. water and find the temperature then record it on the data table (Room Temp Water). The reason for this could be because Sample #2 weighed the attach their own copy to the lab report just prior to handing in the lab to your
Unburnable paper! Plug in all data into the formulas and find the specific heat of each metal. c is the specific heat of ice and delta T is the change in temperature, which is the final temperature minus the initial temperature. Carefully think out all the steps for these Objectives. The piece of metal is then taken out of the boiling water and placed in a calorimeter which contains room temperature water. calorimeters: a simple styrofoam cup
Specific Heat. University of Central Arkansas, 2006. This will be the calorimeter. or where power is known as 1000W. In the second trial a pair of insulated tongs replaced the test tube for holding the sample. s = -209 s = -313 How will you reduce the experimental error when transferring the
and its container will become warmer, until an equilibrium temperature
This poor experimental outcome is likely due to the samples radius being smaller than the radius of the test tube. C which is a large value compared to other sub-stances. Required practical - measuring specific heat capacity was used (ie. What factors
Since the reaction mixture gains heat, the change in temperature will have a positive sign. You should contact him if you have any concerns. s = -376 (1)(-78C) Final Average 3 = 2 J/gC He is credited with the invention of a calorimeter used to measure precise heat quantities in substances.