Coefficient of Thermal Expansion

Better Essays
Introduction The main theory of the experiment is that an object needs an amount of heat for it to change a unit mass by 1 degree in temperature. The objectives of the experiment are to determine the specific heat of metal specimens using the method of mixture, to measure the equipment properly, to carefully measure the temperature of the equipment, to be patient while waiting for the output of the experiment and to be precise in computing for the specific heat of the specimen.
Theory
Blanza, J., Guevara, C., Morsiquillo, A., Nacu, G. (2012) noted that the transfer of energy is made by temperature difference between the object and its surroundings. The common units for heat are calorie and BTU (British Thermal Unit). A calorie is the amount of heat needed to raise the temperature of one gram of water by 1°C while BTU is the amount of heat needed to raise the temperature of one pound of water by 1°F. The factors that affect the transfer of heat energy are substance’s mass, change in temperature and the specific heat capacity of the substance being heated. Under normal conditions, the temperature change (∆T¬) is approximately proportional to the heat (Q). The constant proportionality is called the heat capacity. Given by the equation: Heat capacity = Q / ∆T While specific heat capacity (c) is the heat capacity per unit mass. Given by the equation: c = Q/m∆T where: c - specific heat capacity
Q – heat m - mass ∆T – change in temperature
And derived from that equation we could get heat: Q = mc∆T
The measurement of heat is often made by applying the law of conservation of energy. Calorimetry is the application of this law. Qlost=Qgained For an instance a metal specimen is heated and then placed in cold water in a calorimeter up. The meal specimen will lose heat while the cold water, the calorimeter cup, and stirrer will gain heat. Given by the equation: mxcx(Te-Tx) = (mwcw+mccc+mscs)(Te-Ti) where: mx,mw,mc,ms – the mass of specimen,



References: Blanza, J., Guevara, C., Morsiquillo, A., Nacu, G.(2012) Physics 104 Laboratory Manual College Physics I http://scienceworld.wolfram.com/physics/SpecificHeat.html http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/spht.html

You May Also Find These Documents Helpful

  • Powerful Essays

    thermal expansion

    • 3587 Words
    • 15 Pages

    Experiment 1: Thermal Linear Expansion Abstract: The thermal linear expansion of copper and aluminum is the focus of this experiment where the two metals have a tendency to expand their length in response to the change of temperature. Each metals have their own coefficient of linear expansion which describes how the size of an object changes with a change in temperature while the pressure is held constant. We 're able to determine the theoretical coefficient of linear expansion of the two metals…

    • 3587 Words
    • 15 Pages
    Powerful Essays
  • Good Essays

    Thermal Expansion

    • 644 Words
    • 3 Pages

    Thermal expansion is the tendency of matter to change in volume in response to a change intemperature.[1] All materials have this tendency. When a substance is heated, its particles begin moving more and thus usually maintain a greater average separation. Materials which contract with increasing temperature are rare; this effect is limited in size, and only occurs within limited temperature ranges. The degree of expansion divided by the change in temperature is called the material's coefficient…

    • 644 Words
    • 3 Pages
    Good Essays
  • Good Essays

    Thermal Expansion

    • 835 Words
    • 3 Pages

    Thermal Expansion Thermal expansion is the tendency of matter to change in volume in response to a change in temperature, through heat transfer. The coefficient of thermal expansion describes how the size of an object changes with a change in temperature. Specifically, it measures the fractional change in size per degree change in temperature at a constant pressure. Several types of coefficients have been developed: volumetric, area, and linear. This is used depending on the particular application…

    • 835 Words
    • 3 Pages
    Good Essays
  • Powerful Essays

    Thermal Expansion

    • 772 Words
    • 4 Pages

    Thermal Expansion Experiment No. 2 *Santos, Patricia Mary O. Aquino, Junior Emil S. Bautista, Jennina Besana, Carra Sophiya Lime, Jerricson III-32 BSE General Science July 02, 2012 Abstract This experiment is done to determine the temperature coefficient of linear expansion of different materials. The different temperature coefficient is obtained through the use of an apparatus for measuring the linear expansion. The PASCO Thermal Expansion Apparatus was use to measure the thermal…

    • 772 Words
    • 4 Pages
    Powerful Essays
  • Good Essays

    Thermal Expansion

    • 1399 Words
    • 6 Pages

    PHYSICS FORM: 4D & 4E TOPIC: THERMAL PHYSICS Temperature determines the direction of net heat flow. It is the property o f an object. It’s the amount of kinetic energy a body possesses. Example Brass rod made hot at one end by placing it in a Bunsen flame, while other end is kept away at room temperature, there is a net transfer of energy from the high temperature region to the low temperature end. THERMAL EXPANSION (See chp. 16 in Physics Text). Three states of matter are solids…

    • 1399 Words
    • 6 Pages
    Good Essays
  • Better Essays

    Thermal Expansion

    • 878 Words
    • 4 Pages

    THERMAL EXPANSION HEAT MYP-5 | Thermal Expansion happens a lot in everyday life. When something is heated and expands this is Thermal Expansion. The way Thermal Expansion works, is when it is heated the atoms expand, and then when it is cooled it shrinks. Several examples of Thermal expansion is the tendency of matter to change in volume in response to a change in temperature. When a substance is heated, its particles begin moving more and thus usually maintain a greater average separation…

    • 878 Words
    • 4 Pages
    Better Essays
  • Good Essays

    Thermal Expansion

    • 605 Words
    • 3 Pages

    Thermal Expansion happens a lot in everyday life. When something is heated and expands this is Thermal Expansion. The way Thermal Expansion works, is when it is heated the atoms expand, and then when it is cooled it shrinks. Several examples of Thermal Expansi Thermal Expansion happens a lot in everyday life. When something is heated and expands this is Thermal Expansion. The way Thermal Expansion works, is when it is heated the atoms expand, and then when it is cooled it shrinks. Several…

    • 605 Words
    • 3 Pages
    Good Essays
  • Good Essays

    Coefficient of Linear Expansion Introduction With few exceptions materials expand somewhat when heated through a temperature range that does not produce a change in phase (i.e. melting, freezing, boiling etc.). The added heat increases the average amplitude of vibration of the atoms in the material, which increases the average separation between the atoms. Although this effect is small, it is very important in any application that involves using different materials in an environment where they…

    • 743 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Linear Thermal Expansion

    • 343 Words
    • 2 Pages

    Linear Thermal Expansion The term thermal expansion refers to the increase in size of an object as that object is heated. With relatively few exceptions, all objects expand when they are heated and contract when they are cooled. Perhaps the most important exception to this rule is water. Water contracts as it cools from its boiling point to about 39.2°F (4°C). At that point, it begins to expand as it cools further to its freezing point. This unusual effect explains the fact that ice is less dense…

    • 343 Words
    • 2 Pages
    Good Essays
  • Powerful Essays

    Thermal Physics

    • 1464 Words
    • 6 Pages

    2013 Thermal Physics (Heat) Thermal Physics (Heat) One World Essay One World Essay Introduction On this essay I am going to investigate about how thermal physics interfere with the construction of railways. I was given the possibility to choose between explaining how thermal physics is used in the design of railways or roads and bridges. I chose to explain how it is used in railways because I find it particular more interesting. After that, I will explain what Thermal Expansion is. Posteriorly…

    • 1464 Words
    • 6 Pages
    Powerful Essays