Thermal conductivity of metal rod experiment pdf file

You can experiment with both heat and electricity conduction using items from around your house. Some materials, including copper, will readily while others, like as we have noted before, the selection of the metal for any application probably involves tradeoffs. Instantly cut ice with the amazing high thermal conductivity graphite sheets. In this experiment the thermal conductivity was measured for a copper bar and the temperature distributions were drawn for both a cylindrical and tapered bar and we get the following conclusions. Make sure all the wires are the same gauge, or thickness. Experiment t3 measuring the coefficient of thermal expansion of copper, steel and aluminium objectives to understand the concepts of heat exchange and thermal equilibrium to measure the coefficient of thermal expansion of copper, steel and aluminium to calculate the coefficients of volume expansion of copper, steel and aluminium. The extent to which materials conduct heat can be quantified by a parameter known as the thermal conductivity, symbol k. Metals are excellent conductors of heat and electricityheat energy and electrons travel very quickly through them. Experiment 1 measurement of thermal conductivity of a metal brass bar introduction. After doing some online research, formulate your hypothesis. Experimental measurement of thermal conductivity of an. Thermal conductivity of metal rod free download as pdf file. These values were plotted along with calculated thermal conductivity. Your experiment should be designed so that the ice lasts for the duration of that days experiment.

A section of uranium metal rod cast in graphite was also tested for comparison. Rods for thermal conductivity experiments pack of six. Physics 2 laboratory coefficient of linear expansion. Abstract in this experiment, stainless steel and aluminum were placed within a cussons thermal conductivity. Knowing of the difficulty in obtaining accurate experimental data for most liquids, the task is uncouthly more difficult when the measurements are to. Let all three metals warm up, for example on a radiator, until the thermosensitive films are navy blue. When an object or fluid is at a different temperature than its surroundings or another object, transfer of. Note that the thermistor takes longer to reach thermal equilibrium than does the rod, so you must allow a fair amount of time 12 minutes for the temperature measurement to stabilize. I have examined the final electronic copy of this thesis for form and content and recommend that it be accepted in partial fulfillment of the requirements for the degree of master of science, with a major in mechanical engineering. Unfortunately, there are differing definitions for these terms. Experiment 1 measurement of thermal conductivity of a. An example of thermal conduction can involve a metal rod being heated at one end.

Angstroms method of determining thermal conductivity. Thermal conductivity k is used in the fouriers equation. The experiment value of thermal conductivity of metal rod is less than the standard value because i the thermal conductivity of a material may depend on temperature and also the temperature of the material does change with time ii also, it. Get your own free piece of graphite to run this experiment. Coffin a description is given of an apparatus used for determining the thermal conductivities of solids in the temperature range. Thermal conductivity of metals, metallic elements and alloys. Thermal conductivity is a measure of the ability of a substance to conduct heat, determined by the rate of heat flow normally through an area in the substance divided by the area and by minus. In order to try to help to solve the above problem, the present paper discusses a simple experiment and procedure of analysis that are suggested for laboratory classes where the students are introduced to the scientific method based on the determination of the thermal conductivity of metals. When dealing with a known amount of material, its thermal conductance and the reciprocal property, thermal resistance, can be described. This thesis presents an experimental determination of the thermal conductivity of copper as a function of porosity, and an insight into the way this conductivity depends on temperature. Undergraduate study of thermal conductivity of metals. Physics made easyheat transfer thermal conductivity. Tc is the difference in temperature that exists between two points on the rod, and l is the distance between the two points.

In the case of a high thermal conductivity the sample geometry is formed by a cylinder or rod. Experimental measurement of thermal conductivity of an unknown material. Thermal conductivity experiments chemical engineering. In physics, thermal conductivity, k, is the intensive property of a material which relates its ability to conduct heat. The thermal conductivity for copper in a cylindrical bar was calculated to be 452. This presentation is about the basics of thermal conductivity and its method, formula derivation and also its applications. Thermal conductivity of wood and metal school of physics.

Why do you making sure the gauge is the same might be an. Pdf investigation of thermal conductivity of metal. The knowledge on the thermal conductivity of molten materials salts, metals, semiconductors, polymers is very scarce, both from the experimental and theoretical points of view. Thermal conductivity k is the quantity of heat transmitted due to an unit temperature gradient, in unit time under steady conditions in a direction normal to a surface of the unit area. Thermal conductivity of metal rod thermal conductivity. Describe the experiment to the experiment to the students the dowel is flush against the metal rod, and paper is wrapped around the midpoint or join. Thermal conductivity of metal rod course code ekb 2091 course name chemical engineering lab 11 group member id mohamed aadil ashraff 1103151010 criteria very poor poor good very good excellen t 1. Comparing thermal conductivity of copper, aluminium and. The experiment value of thermal conductivity of metal rod is less than the standard value because i the thermal conductivity of a material may depend on temperature and also the.

Rods for thermal conductivity experiments b8h25509. Determination of thermal conductivity thermal conduction is the transfer of heat from one part of a body to another with which it is in contact. The heat energy supplied to the lower calorimeter can be calculated using equation 6. Experimental determination of the thermal conductivity of. An apparatus for measurement of thermal conductivity of. Thermal conductivity of metal rod heat transfer laboratory.

From the experiment it is concluded that the temperature goes on decreasing along the length of the rod. The effect of different thermal conductivity can be demonstrated not only with heating the metals, but also with cooling them. Faculty of chemical engineering laboratory submission form name vengadeesh verasamy 1103151018 title of experiment experiment 2. Bouchard physics department, the college of wooster, wooster, ohio 44691 may 4, 2000 this experiment used angstroms method to determine the thermal conductivity of a brass rod. The thermal conductivity of uranium was found to decrease with decreasing density.

To measure the coefficients of expansion of several metals. Thermal conductivity 2 definitions the reciprocal of thermal conductivity is thermal resistivity, usually measured in kelvinmeters per watt kmw. Then submerge the ends of the metal sheets in a mixture of water and ice. Angstroms method of determining thermal conductivity andrew m. Lab 2 thermal conductivity of metal rod faculty of. When the thermal conductivity of a material is low, the samples are usually. Chapter 16 determinationt of therma l conductivity page 87 16. Forbes method of measurement of thermal conductivity one of the oldest methods of determining the thermal conductivity of metals is by forbes. Use as a poe demonstration to explain thermal conductivity. Conductivity experiments with metals hst chemistry project.

Hi friends, in this video i have explained with an animation, how the thermal energy travels by conduction through a metal rod, and a practical feel for how searles apparatus works. Linearexpansion apparatus, steam generator, breaker, 100o c thermometer, rubber tubing, metal rods of aluminum, iron, copper, brass, and steel. The values and the change in the temperature difference on the metal rod are plotted as a function of time. Check out our collection of thermal conductivity experiments. Attach some wax to the end of each one, and then stick a coin onto the wax. Heat is applied periodically to one end of a metal rod while the other end is left at the temperature of the surrounding medium. This is because the thermal conductivity of wood is better along the grain of the wood. Thermal conductivity is the physical property of the material denoting the ease with which a particular substance can accomplish the transmission of thermal energy by molecular motion. Conduction experiment to demonstrate the heat conductivity of a solid take a few rods each made of a different substance for example, three different metal rods. Collect a metal spoon, wooden spoon, and other kitchen implements to compare heat conductivity. K compare the value of thermal conductivity obtained by experimentation with standard value. In this method a long rod of a metal with uniform cross section is heated at one of its ends. The thermal conductivity is defined by the time rate of transfer of heat by conduction, through unit thickness, across unit area for unit difference of temperature. Overview of heat transfer phenomena heat transfer is the transition of thermal energy from a heated item to a cooler item.