The necessary data may be conveniently obtained by heating a sample of known mass to some known temperature. A calorie is the amount of energy necessary to raise. From equation 2, the amount of heat lost by the metal hot substance is the. To measure specific heat in the laboratory, a calorimeter of some kind must be used. Heat capacity of a body is the quantity of heat required to raise the temperature of the body by 1oc. The specific heat capacities of all other substances. Specific heat of a metal lab purpose determine the specific heat of a metal using a calorimeter. From the definition of the calorie given, it can be seen that the specific heat of water is 1 o o. The cold sample and calorimeter would gain less heat. The specific heat of a substance is the heat capacity per unit mass. The relationship between heat and temperature change is usually expressed in the form shown below where c is the specific heat.
Experiment 9 specific heat capacities of metals the purpose of this experiment is to identify two unknown metal samples based on physical properties. Specific heat of a metal you will find the specific heat of a metal by equating the heat lost by the metal at high temperature to the heat gained by the water reservoir at a lower temperature when they are mixed in the calorimeter. Heat capacity 28heat capacity reference noakes, textbook of heat. Specific heat capacity c measures the amount of heat needed to increase the temperature of a mass of a material by one degree.
Heat capacity 28 heat capacity reference noakes, textbook of heat. Q in j is calculated based on equation 1, using the specific heat of water, 4. Lab 9 report experiment 1 experiment 1 determination of. Heat and calorimetry introduction have you ever roasted marshmallows over a campfire. Specific heats of metals safety precautions always wear safety goggles and a lab apron to protect your eyes and clothing. Specific heat lab winstonsalemforsyth county schools. Often applied to metallic elements, specific heat can be used as a basis for comparing how different substances absorb and transfer energy. Calorimetry, heat of reaction specific heat is an intensive property of a single phase solid, liquid or gas sample that describes how the temperature of the sample changes as it either absorbs or loses heat energy. In this lab, we will assume that no heat will be lost to the surrounding environment. This is the most dangerous lab that you will perform during this course. Calculate the specific heat of each metal, always safety goggles, gloves.
In this lab, we will determine the specific heat capacity of copper. The purpose of this experiment is to identify two unknown metal. Experiment 9 specific heat capacities of metals chem21labs. Specific heat of a metal lab calculations specific heat of a metal lab specific heat of a metal lab determine the specific. They will set up a calorimeter to measure the heat changes of two. The specific heat at a constant pressure, cp is defined as the heat capacity per unit mass when all changes are make fro a fixed volume. Often applied to metallic elements, specific heat can be used as a basis for comparing energy absorption and transfer. Heat 250 ml of water in a 400ml beaker until it is boiling gently. Specific heat of a metal you do not need the mass of the calorimeter. The final temperature for the mixture would be less.
Identify the composition of the metal using the value of its specific heat. Specific heat capacity of metals table chart engineers. A calorie is the amount of energy necessary to raise the temperature of 1 gram of water 1 degree celsius. While the water is heating, determine and record the mass of a clean, dry 50ml beaker to the nearest 0. The specific heat capacity of a material is the amount of energy per needed to raise the temperature of 1kg of mass by 1 kelvin. This is also the final temperature of metal results trial 1 trial 2 mass of water in calorimeter include units change in temperature of water include units change in temperature of the metal include units specific heat of water 4. Chemistry lab determining the specific heat capacity of copper purpose by assuming that heat lost by one material is gained by another, we can apply this principle to hot copper pennies and cool water in a calorimetric cup. Students will learn about specific heat capacity and how to calculate it. Water, for instance, has a specific heat capacity of 4. Why is it better to use boiling water to heat the metal sample and not room temperature water. Specific heat of a metal the amount of heat which one object transfers to another depends upon the mass of the object, the temperature change it undergoes, and its specific heat. Flinn scientific catalogreference manual for general guidelines and specific.
This property can be measured quite accurately and is called specific heat cp. The specific heat, s, of an object is an intensive property describing the number of joules it takes to raise the temperature of 1. Introduction definitions the purpose of this experiment is to determine the specific heat of two metal blocks. In this lab, we will use boiling water to heat the metal sample to 100 c. Define objectives a calorimeter, measure changes in the temperature of in the calorimeter when metals are added. The specific heat of a metal bainbridge island school. Specific heat of a metal lab temecula valley unified. Chem 9 lab guide page 1 experiment 9 experiment 9 specific heat capacities of metals the purpose of this experiment is to identify two unknown metal samples based on physical properties. Phys 1401 general physics i experiment 12 specific heat i. If you get a chemical in your eyes, immediately flush the chemical out at the eyewash station while calling to your teacher.
Where c m specific heat of the metal cw specific heat of water mm mass of metal mw mass of water tim initial temperature of the metal tf final temperature of metal and water tiw initial temperature of the water safety warning. Water was chosen as the standard and assigned a specific heat of 1. The metal must first be heated and its temperature measured, tinitial metal. Heat is needed to warm up anything, but the amount of heat is not the same for all things. Since all metals have different densities and makeups i think that the heat capacity will greatly vary.
Hypothesis, data tables 3, calculations, error analysis, conclusion. Obtain a sample of a metal or other substance supplied by your instructor. The greater a materials specific heat, the more energy must be added to increase its temperature. A calorie is defined as the amount of energy it takes to raise the tempera. The purpose of performing this lab was to find the specific heat capacity of an unknown metal. T, its mass m, and an intrinsic characteristic of the material forming the body called specific heat c p. You have probably heard that foods have calories, but do you know what a calo. Specific heat capacity is the amount of energy, measured in calories or joules, needed to raise the temperature of 1 g of the substance by 1 c. Using the actual specific heat of aluminum, how many joules of heat are required to raise the temperature of 325 g of metal from 34. Background specific heat is the amount of energy required to increase the temperature of 1 gram of a substance by 1.
The amount of heat required to raise the temperature of a solid body depends on its change in temperature. Return or dispose of all materials according to the instructions given by your teacher. Small pieces of ice two metal solids made of different materials paper towels introduction. While the water is heating, determine and record the mass of. Recruit student volunteers to measure and record data. This video shows the collection of data to determine the specific heat of a metal. In this experiment, you will determine the specific heat of a substance. If the final temperature of the mixture is less than the specific heat of the metal would come out to be much less than it should. Specific heat is the amount of energy, measured in joules, needed to raise the temperature of one gram of the substance one celsius degree. Determination of specific heat of a metal after completing the procedure and postlab equations, compare the specific heat of the unknown metal to a table containing values of specific heats for several metals in order to determine the identity of your metal. This property can be measured quite accurately and is called specific heat c p. Heat and calorimetry objectives x gain applicable knowledge about calories x compare the calorie content of food samples introduction most people are aware that foods contain calories, but what is a calorie. The specific heat of a substance, usually indicated by the symbol c, is the amount of thermal energy required to raise the temperature of one gram of the substance by 1oc or 1k.
Hsps34 plan and conduct an investigation to provide evidence that the transfer of thermal energy when two components of different temperature are combined within a closed system. Heat is transferred when there is a temperature unbalance, in this experiment it is a hot metal cylinder at 100c being submerged in water that is at room temperature. Show your calculation below and enter your result in the data table. The quantity of heat liberated or absorbed when the temperature of 1.
Specific heat capacity and latent heat lab report fy003. Online library specific heat of metal lab answers specific heat of metal lab answers specific heat of a metal lab part of ncssm core collection. The purpose of this lab experiment is to measure the specific heat capacity of unknown metal samples and also to determine the latent heat of fusion of water. Heat capacity of an unknown metal heat capacity of an unknown metal purpose.
The specific heat is the amount of heat enregy per unit mass required to raise the temperature by one degree celsius. Specific heat of metals lab this video takes you through the major steps in the specific heat of metals lab that we will be doing. To measure specific heat in the laboratory a calorimeter of some kind must be used. In addition, we will study the effectiveness of different calorimeters. Lab four specific heat of a metal 1 name lab partners section date specific heat of a metal objective in this experiment you will use calorimetry to determine the specific heat of a metal. For a body of mass m to experience a temperature change of. Could we have used ice water to cool the sample to 0 c so that the temperature of the calorimeter. Chemistry lab determining the specific heat capacity of. After completing the procedure and postlab equations, compare the specific heat of the unknown metal to a table containing values of specific heats for several metals in order to determine the identity of your metal. Introduction when a substance is heated, the motion of its individual particles increases, resulting in an increase in temperature. In this experiment, you will determine the specific heat of three different metal. Copies of the relevant sections are available at the resource centre. Hsps34 plan and conduct an investigation to provide evidence that the transfer of thermal energy when two components of different temperature are combined within a. Every substance has its own specific heat capacity this physical property relates energy change to temperature change.
In this experiment, you will determine the specific heat of a metal sample. This value is high in comparison with the specific heats for other materials, such as concrete. From equation 2, the amount of heat lost by the metal hot substance is the same as this amount of heat you just calculated. Once c is determined, use the law of dulong and petit to calculate the approximate atomic mass of an unknown metal.