Calorimetry To determine the specific heat of a metal and its approximate atomic mass. To determine the heat of neutralization for a strong acid-strong base reaction. To determine the quantity and direction of heat flow for the dissolution of salt. Post Lab Questions and Answers: 1. In parts A and B in‚ the calorimeter‚ although a good insulator‚ absorbs some heat when the system is above room temperature. Is the reported value for the specific heat of the metal too high or too low? Explain
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Calorimetry labs are frequently performed in order to determine the heat of reaction or the heat of fusion or the heat of dissolution or even the specific heat capacity of a metal. The calorimeter is a device used to measure the quantity of heat transferred to or from an object. The amount of heat needed to change the temperature depends on how much you want to change the heat. Specific heat capacity is different for all
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The Webster’s Dictionary defines calorimeter as‚ “an apparatus for measuring quantities of absorbed or emitted heat or for determining specific heats.” While direct calorimeters measure the amount of heat produced in a small chamber‚ indirect calorimeters measure the amount of heat produced by taking into account the amount of consumption of oxygen and elimination of carbon dioxide. Both contain the same concept‚ but have a different approach. Indirect calorimetry is the preferable way for physiologists
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is typical of 1mm diameter. Flame extinction is the biggest disadvantage of Microcombustion as heat losses become more important at smaller scales. So in order to maintain the balance between heat generated and heat lost through a Microcombustor‚ properly designed Microcombustor with suitable fuel has to be used. In the prescribed research work‚ two dimensional mathematical models for momentum‚ heat‚ and mass transport are used to simulate the combustion processes. Equations are solved numerically
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interpretation of temperature • Temperature • Heat • Thermal Expansion • Specific heat capacity • Expansion of water • Conduction • Convection • Radiation • Phases of Matter and phase changes • 1st Law of Thermodynamics • Thermodynamic processes • 2nd Law of Thermodynamics 1. How much heat (in Joules) is required to raise the temperature of 30kg of water from 15°C to 95°C? 2. What is the specific heat of a metal substance if 135kJ of heat is needed to raise 5.1 kg of the metal from
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amount of heat required to raise the temperature of one pound of water one degree Fahrenheit. Class A fires Fires involving ordinary combustibles. Class B fires Fires involving flammable liquids. Class C fires Fires involving energized electrical equipment or wires. Class D fires Fires involving combustible metals. Class K fires Fires involving cooking oils. Combustion A chemical process between fuel and oxygen with the evolution of light either as a glow or flame and heat. Some
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Heat‚ Kinetic Energy and Temperature SCI 110 02/01/2013 The study of heat relate to Kinetic theory of matter is that universe is made up of matter and energy. Matter is made up of atoms and molecules. Atoms and molecules are always in motion because energy. Energy forces them to contact into each other or vibrate back and forth. When this happens molecules and atoms
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Determining the Specific Heat of an Unknown Metal Objective: To determine the specific heat of an unknown metal through the use of a calorimeter. Background: The specific heat of any substance represents the quantity of heat energy in joules required to heat one gram of the substances by one °C. The specific heat of a substance is dependent upon the temperature; this means that there is a temperature range for which the specific heat of a substance applies. For metals and metallic substances
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surface that absorbs less heat‚ and remains cooler. There are several factors that cause higher temperatures in urban area like dark rooftops‚ dark asphalt surfaces‚ and more buildings with more emitted heat from air conditioners and furnaces and denser traffic which cause elevated emissions of air pollutants. Dark roofs and dark asphalt surfaces have much lower albedos than rural areas‚ and this causes a buildup of heat in cities during the summer months and because the heat absorbed by the paved
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sunlight to heat energy and retaining the heat for cooking. To make the process work‚ you cover as much of the box as possible with reflective material in order to catch as much sunlight as possible. In this case‚ you are using tin foil. The cooking surface is black construction paper because it retains heat very well. If you’ve ever worn a black shirt on a sunny day‚ or sat down on the black seat of a car in the summer‚ you know that black surfaces absorb and retain a lot of heat. Ouch! As heat is retained
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