The magnitude of specific heat varies greatly from large values like that of water (4.184 J/g°•C) to small values like that of mercury (0.14 J/g°•C). Download Full PDF Package. Aim. With the change of temperature, mass of the objects, and the specific gravity of water and aluminium, the specific heat capacity of the metal sample was determined to be 0.222cal/gC°. 1065 Words5 Pages. The graph of SHC against time was plotted. After doing the experiment, the students will be able to . Perform the experiment with each of the metals and the unknowns. write a report on the experiment. List the three methods of heat transfer and one example of each. You will also measure the heat of fusion of ice if time permits. Topic: Specific Heats. determine the specific heat of a metal by the mixtures method. calculate the specific heat of the substance using your mass and temperature data. Moreover, The metal sample was made from aluminium which has a specific heat capacity of 0.215cal/gC°. Variables Dependent Variables Since only one trial was performed This is 200 g of water, as the density of water is 1 g/ml. This paper. Therefore, if heat, Q, leads to a temperature change, \(\Delta T \), of an amount of mass, m, the specific heat… Conclusion~ First of all, calorimeter was not completely isolated and heat was lost also before the hot water was poured into calorimeter and the room temperature (air-conditioned) is the one which affects the values of our results. List the symbol and at least two units for specific heat. A sample of lead was determined to have a specific heat of 0.51 cal/g0C. A cylindrical block of the metal is drilled with two holes, one to receive an electric immersion heater and the other a thermometer. The accepted value for the specific heat of aluminum is 0.90 J/g* °C. The lab also uses distilled water, which is water purified by a process of heating and cooling. Independent Variable: Temperature of Aluminum Balls Dependent Variable: Temperature of Water in Foam Cup Download PDF. 23rd May 2016. 4. Click here to download the AQA student sheet for this experiment. Copper lab report. The value of c in aluminium, from Fig 3 was found to be 1.00 0.14 kJ/kg/C. The process of measuring quantities of heat is called calorimetry. 3. Evaluation In this experiment, since mass will mainly be expressed or measured in grams, we will use the unit shown on the right for specific heat.. On this basis, c iron = 0.108 Note that in general, metals take less heat for their temperature to increase by a certain amount compared to water; therefore, metals have lower specific heats than water. Using the values for the specific heats of three metals given here, try to identify the metal. LAB 7 LAGCC FALL 2017 Chemlab 2 - Qualitative Analysis of Ions B YOGI-bleaches - Determining the Empirical Formula of a Hydrate D YOGI-calorimetry - Calorimetry: Determining Specific Heat and Heat of Reaction D General Chemistry Lab Report 7 Labreport#7 - Colorimetric Determination of a Food Dye C Let us note that if we know the specific heat capacity c of a substance of mass m, which is heated (cooled) by Δt, the heat Q supplied to (taken out of) the substance can be expressed as: \[Q\,=\,cm\Delta t,\tag{1}\] In this experiment, the water is heated by electric current passing through a … THEORY In this experiment, we will determine the specific heat capacity of a metal and compare it to an accepted value. calculate the uncertainty of the experimental results. CSEC Physics Lab - Specific Heat Capacity. (A _____, _____, _____ 2. The calculated value does not match exactly but it is in the correct order of magnitude. The … 3. View lab report physics.docx from PHY 210 at Universiti Teknologi Mara. To measure the specific heat capacity of water. The metal’s actual identity is aluminum, which is not the result that was determined from the experiment. EXPERIMENT 12 SPECIFIC HEAT I. Metal: Brass Scale is very sensitive Mass 49.99 You use two stryfoam cups to increase insulation to prevent heat loss. Objective: To determine the specific heat of a metal. Pre-lab reading. Kwame Boamah Buabeng. The accepted value for lead is 0.031 cal/g 0C, which is a 64.5% error. Using equation 4, calculate the metal’s specific heat, cmetal, given that the specific heat of the calorimeter, ccal, is 900 J/kg°C and the specific heat of water, cwater, is 4186 J/kg°C. 1. EXPERIMENT 8 . In this experiment you will measure the specific heat capacity of water and aluminium. INTRODUCTION The objective of this experiment is to measure the specific heat of several different substances. Specific heat capacity (J g℃) Density (g cm3) Metal Specific heat capacity (J g℃) Density (g cm3) Gold 0.13 19.3 Zinc 0.39 7.14 Lead 0.13 11.4 Iron 0.45 7.86 Silver 0.24 10.49 Aluminum 0.90 2.70 Copper 0.39 8.96 Magnesium 1.02 7.44 9.4.5 Calculate Percent Difference Calculate the percent difference between your experimental value of specific heat capacity and the literature value. Abstract. The specific heat of a substance is a measure of the amount of heat (energy) needed to raise the temperature of a unit mass of the substance by \( 1 ^oC \). Method Example 4. From doing the above experiment, we obtained the following data: 2. The value of c … Specific heat is a physical property of a substance that is defined as the quantity of heat needed to raise the temperature of one gram of the substance by 1 degree centigrade. Specific heat of aluminum: (2653.74 J)/(45.51 grams X 72.1 °C) = 0.90 J/(g*°C) Percent Error = (Experimental Value –Acccepted Value)/(Accepted Value) × 100% Conclusion: The values obtained in the lab were inconsistent with the accepted value of the specific heat of aluminum. The actual value for the specific heat capacity of aluminium is 900 J/kg°C. This is closest to the specific heat of titanium .523 J/g℃. Read Paper. Define specific heat, water equivalent and heat capacity of a body. Learning Outcomes of Experiment 1. A short summary of this paper. Every substance has a different specific heat capacity. The heat capacity of an object, C, is defined as the amount of heat that must be added … Investigating the specific heat capacity of different metals. In a Styrofoam cup, record the temperature of the 200 ml of cold water. specific heat lab Purpose The purpose of this lab experiment is to measure the specific heat capacity of three know metal samples and compare the measured values with those obtained from handbooks Background Introduction When two objects originally at equilibrium at different temperatures are brought into contact, energy is transferred from the hotter body to the cooler body. The uncertainty from this experiment is the volume of water should be constant. Obtain a sample of metal that has been immersed … For detail theoretical introduction please look at the Appendix 1. graduated cylinder, stand and hot plate, 1000 ml beaker, paper towel, 3 objects (aluminum, steel and brass). Experiment to Find the Specific Heat Capacity of an Aluminium Block DATA COLLECTION: Mass(m) (kg) (5dp) Current(I) (A) (2dp) Voltage (V) (2dp) Time(t) (s) (0dp) Initial temp(T1) (ºC) (2sf) Final temp(T2) (ºC) (2sf) +/-( 5*10^ -4) % +/- (1*10^ -1) % +/- (4*10^ -2) % +/- (5*10^-1)s +/- 0.5 ºC +/- (5*10^ -1) ºC 0.99577 3.70 12.07 0 16.0 16.0 0.99577 3.70 12.08 60 16.0 18.0 0.99577 3.68 12.10 120 16.0 20.0 Water has a high specific heat, 4.18 J/goC. Aluminum has a specific heat of .897 J/g℃, when in the experiment the result was a specific heat of .508 J/g℃. This experiment was conducted to identify a quantity of unknown metal using calorimeter and conservation of heat principles and determine specific heat of metals. International System of Units................................................................................................................ii Abbreviations........................................................................................................................................iii This will be done by mixing two different substances and measuring ... Aluminum Al (cal/g C) Lead Pb (cal/g C) Brass (cal/g C) 0.119 0.092 0.054 0.0925 0.214 0.0306 0.0917 4. 1. It is sometimes called specific heat capacity. The specific heat capacity of pure water is 4200 Jkg-1 K-1, but since I used tap water in my experiment, I expect the average value of my experiment to be bigger than the normal value. The aim of this experiment is to measure the specific heat capacity of aluminium (c A) using an electrical method. Specific heat capacity of aluminium AIM The aim of this experiment is to measure the specific heat capacity of aluminium (c A) using an electrical method. SPECIFIC HEAT . INTRODUCTION: To raise the temperature of a body from a given initial temperature T 1 to a final temperature T 2 requires a total quantity of heat which depends on the mass of the body, the specific heat of the material of which the body is composed, and the temperature difference. YOU WILL NEED. 1. On the other hand, the specific heat capacity of any metals is lower compared to the specific heat capacity of water. Conclusion The specific heat of metal based on this experiment for aluminium is 313.88J kg − 1 ° C − 1, for copper 306.27 J kg − 1 ° C − 1, for Brass is 306.21 J kg − 1 ° C − 1 and for iron is 307.29 J kg − 1 ° C − 1. Using the correct specific heat of 137J/kgoK, after 30 inversions of the tube the temperature of the lead shot should have been: 30*0.9m*9.81ms !2 /157Jkg !1 K !1 =1.7 o K
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