The specific heat capacities of all other substances. Determination of specific heat of certain materials can be carried out in a simple setting in which only heating and measuring temperature are the only tasks involved on the assumption that the value of the heat or energy used is derived from a power input typically in watts or js. After completing this experiment, the student will be able to. List the three methods of heat transfer and one example of each. You may assume your reader is familiar with the general lab equipment, and using. In this experiment, you will determine the specific heat of a substance. It makes no difference whether the rise in temperature is in celsius or kelvin but in this experiment c will be used. The filling of hot apple pie can burn your tongue while the crust will not. Qlost q gained heat, q specific heat of substance x mass of substance x change in temperature. Key concepts heat, specific heat, calorie, temperature objectives. Which substance has a greater specific heat capacity. Describe the shape of a time temperature graph of the water in your calorimeter cup after the hot metal was placed into it and up until the time the metal and water reached equilibrium.
Do not touch hot equipment and handle hot glassware carefully. In this experiment, you will determine the specific heat of three different metal samples. The specific heat of a substance is one such physical property. C molar heat capacity is similar, but for 1 mole of a. Calorimetry is a method by which you can calculate heat released by one thing metal by looking at the heat gained by water since you know the c p of water. What temperature, or temperature range, does your value correspond to. Phys 1401 general physics i experiment 12 specific. To find the specific heat capacity of a metal using the method of mixtures. The purpose of this activity is to determine the specific heat of the metal object and identity the metal. The high specific heat value of water means that water is able to absorb and store large amounts of.
The specific heat capacity of water and metal lab report. In this lab you will heat a metal and then transfer it to water and see how much the water changes in temperature. The purpose of this experiment is to identify two unknown metal samples based on physical properties. The objective of this experiment is to measure the specific heat of several different substances. Note that the specific heat for aluminum is given below. In this experiment, students will find the specific heat of three unknown samples of metal. 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. Using the data you recorded and equation 3, calculate the specific heat of metal 1. 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.
This represents the amount of heat lost exothermic by the metal. In addition, we aim to determine the temperature of the hottest part of the bunsen burner flame. Place the metal in a test tube, and label the test tube with the metal s name. Obtain a sample of a metal or other substance supplied by your instructor. While the water is heating, determine and record the mass of. Heat capacity of metals lab report discussion squarespace. For each trial, calculate the mass of the roomtemperature water, the. Substances can be identified on the basis of their chemical and physical properties. You will then try to identify the metals using these values. Specific heat is the amount of energy measured in joules, needed to raise the temperature of one gram of the substance one celsius degree.
To measure specific heat in the laboratory, a calorimeter of some kind must be used. Use a simple calorimeter to conduct an experiment to measure heat transfer. To do this, students will use their knowledge of thermodynamics to. The calorimeter is insulated to reduce the loss or gain of energy to or from the surroundings. From equation 2, the amount of heat lost by the metal hot substance is the. Using the values for the specific heats of three metals given here, try to identify the metal. For example, the specific heat capacity of water is 4. Heat a metal block in boiling water temperature t b and transfer it quickly to the calorimeter. Water, for instance, has a specific heat capacity of 4. To do this, students will use their knowledge of thermodynamics to construct a calorimeter.
We will consider the specific heat capacity of the water to be known, 1. Use this table of specific heats to determine the identity of your metal. Investigating specific heat capacities of metals sample. Place the four test tubes of metal into the boiling water bath. In this investigation, you will use a simple calorimeter and your knowledge of the specific heat of water to determine the specific heat of lead. How does the specific heat of a metal affect the ability of the metal to heat up water. The objective of the experiment is to find out the specific heat capacity of water by monitoring change in. To measure specific heat in the laboratory a calorimeter of some kind must be used. To fixed your curiosity, we pay for the favorite lab 22 specific heat of metals answers record as the another today.
Hypothesis, data tables 3, calculations, error analysis, conclusion. Scientists use calorimeters to determine the amount of heat gained or lost by a substance or. The specific heat capacity of unknown metal page 1 purpose you will gain an understanding of the terms heat, heat capacity, and specific heat capacity. Using this information, determine the specific heat c of copper. Define specific heat, water equivalent and heat capacity of a body. Materials and equipment two styrofoam cups, hot plate. Specific heat of metal cp heat gainedbythewaterj massof metal g. Metal aluminum copper lead silver tin zinc specific heat jg c 0. Specific heat, c sp, is the amount of heat required to change the heat content of exactly 1 gram of a material by exactly 1c.
This video shows the collection of data to determine the specific heat of a metal. Conclusion the main objective of the lab was to determine the specific heat capacity of copper and aluminum metals using calorimetry. Since specific heat capacity does not depend on the object in question, only the substance from which it is made, specific heat capacities are much more useful. Specific heat is a property of a given substance, abbreviated as. Metal specific heat capacity, c s jg k metal specific heat capacity, c s jg k lead 0. Often applied to metallic elements, specific heat can be used as a basis for comparing energy absorption and transfer.
In this experiment we will neglect the heat absorbed by the styrofoam container as it is negligible. Heat a metal block in boiling water temperature tb and transfer it quickly to the calorimeter. The necessary data may be conveniently obtained by heating a sample of known mass to some known temperature. In this lab you will determine experimentally the specific heat capacity for two unknown metal samples. Using a hot plate, heat approximately 200 ml of water in a 400 ml beaker until boiling. At that time, it was found that the specific heat at constant volume cv of a substance is defined to be its heat capacity per unit mass when all changes are made at a fixed volume.
Use the value of q calculated in part a and equat ion 2 to calculate s, the specific heat of the mineral. The amount of heat needed to raise the temperature of one gram of a substance by one celsius degree is call the specific heat or. You will use a simple styrofoamcup calorimeter to measure the specific heat capacity of an unknown metal in order to identify that metal and confirm the law of dulong and petit. To determine a specific heat capacity, c, solve the equation q mc. Heat capacity by jamu alford with help from sari belzycki abstract using a styrofoam cup as a calorimeter the specific heat of water was found to be 5. Plug the temperature probe into channel 1 of the lab pro. Specific heat, c heat gained by the water, q of metal mass of metal g. 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. Specific heat is the amount of energy, measured in joules, needed to raise the temperature of one gram of the substance one celsius degree. The purpose of this experiment is to determine the specific heat of one or more metals. This property can be measured quite accurately and is called specific heat c p. The specific heat of a substance, usually indicated by the symbol c, is the.
Identify the composition of the metal using the value of its specific heat. Show your calculation below and enter your result in the data table. Experiment 9 specific heat capacities of metals chem21labs. Specific heat of a metal lab purpose determine the specific heat of a metal using a calorimeter. Specific heat is the amount of energy necessary to increase the temperature of a specific mass of a substance by a specific amount. Cookbook overview in this experiment, students will find the specific heat of three unknown samples of metal. This is a record that will play a role you even other to outmoded thing. Boiled onions and moist squash on a hot dish, for example, are often too hot to eat while mashed potatoes may be just right. Background specific heat is the amount of energy required to increase the temperature of 1 gram of a substance by 1.
In addition, we will study the effectiveness of different calorimeters. Load temp sensor from physics experiments phys 220 221 calorimetery. Specific heat lab questions analysis and conclusions 1. For each trial, calculate the specific heat of the metal. While the water is heating, determine and record the mass of a clean, dry 50ml beaker to the nearest 0. Therefore it is desirable to know the specific heat of a substance. In this experiment you will use calorimetry to determine the specific heat of a metal. The metal sample will be heated to a high temperature then placed into a calorimeter containing a known quantity of water at a lower temperature. This video takes you through the major steps in the specific heat of metals lab that we will be doing.
Your unknown metal is one of the metals in the table below. Lab four specific heat of a metal objective introduction. Water match the substance with the two specific heat capacities g k j 0 8 1 4 oc water 664 j kg oc sand part ii. To measure specific heat in the laboratory, a calorimeter of some. The specific heat capacity of a substance is the amount of heat energy necessary to raise the temperature of. Using equation 4, calculate the metal s specific heat, cmetal, given that the specific heat of the calorimeter, ccal, is 900 jkgc and the specific heat of water, cwater, is 4186 jkgc. Then, use the same equation you did for water, only this time, you will solve for specific heat. A calorimeter is a wellinsulated container used in measuring energy changes. Heat is needed to warm up anything, but the amount of heat is not the same for all things. For each metal sample, use the value for heat gained by the water that you calculated. While the water is heating, use an electronic balance to determine and record the exact mass of the metal sample. Almost everyone has noticed that some foods remain hot much longer than others. Determine the specific heat of one of the metal blocks, using equation 2. We will consider the specific heat capacity of the water to be.
Aug 07, 2011 experiment 7 finding the specific heat of a metal heat is needed to warm up anything, but the amount of heat is not the same for all things. In this calculation, you will solve for the specific heat of the metal. Choose the metal with the specific heat that is closest to your experimental value. List the symbol and at least two units for specific heat. C objectives in this experiment, you will measure the mass and temperature of water in a calorimeter, heat a metal sample of known mass to a specific temperature. In this lab, specific heat is a lowercase c with sub script sp. Heat 250 ml of water in a 400ml beaker until it is boiling gently.
Where to download lab 22 specific heat of metals answers it is coming again, the supplementary heap that this site has. The heat q lost by a specimen, say a piece of metal, submerged in water equals the heat q gained by the water and by the container. Return or dispose of all materials according to the instructions given by your teacher. Then, use your experimental values and the specific heat capacity for water 4. This value is high in comparison with the specific heats for other materials, such as concrete. Experimental determination of the specific heat of a metal by mixing. 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. The metals will be heated to a high temperature then placed into the. Consider carefully the systematic errors present in this experiment. The metal must first be heated and its temperature measured, tinitial metal. Attach a string to the metal and lower it into the hot water. 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. Often applied to metallic elements, specific heat can be used as a basis for comparing how different substances absorb and transfer energy.
Metal specific heat jgc metal specific heat jgc silver 0. Heat lost by the pennies is equal to heat gained by the water in the calorimeter. Calorimeter, stirrer, centigrade thermometer, boiler with heater, balance, metal sample, water. Equation 2 uses q, the heat transferred from the metal sample to the water, to calculate the specific heat of the metal. The specific heat of the metal can now be calculated.
Jan 27, 2006 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. The purpose of this experiment is to identify two unknown metal samples based on physical. A separate video will show you the calculation that w. Water was chosen as the standard and assigned a specific heat of 1. In this experiment, we will add a metal sample at a high temperature to water at a low temperature. Phys 1401 general physics i experiment 12 specific heat i. Specific heat of an unknown metal the specific heat s of a pure substance is defined as the amount of heat needed to raise the temperature of one gram of the substance by one degree either celsius or kelvin.
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