Heat Food Lab * Purpose: * Understand how to calculate calories per gram from burning food in the laboratory. * Understanding how to use the food nutrition label on the back of the package to calculate the calories per gram. * The calculated calories per gram in the laboratory are compared to the calories per gram that were calculated from the nutrition label. Then the % error and % yield are calculated and displayed in table and in a graph. * Students will be able
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Objective: to show the relationship between pressure and temperature of saturated steam Apparatus: a Marcet boiler (Figure 1) is used. It is provided with a pressure gauge‚ a digital thermometer and a safety valve. An aneroid barometer is used to determine atmospheric pressure. 1 2 3 Drain valve Heater Overflow Variation of saturation temperature with pressure Thermodynamics Laboratory Manual Marcet boiler 4 5 6 7 8 9 Temperature sensor Pressure relief valve Filler opening with
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Designer built to withstand the test of time‚ Teka’s meticulous attention to the tinniest details is evident; its ovens stay immaculate and impeccable over the years with its anti-fingerprint and enamel treatments. Furthermore‚ Hydroclean is a new technology applied on the enamel of the oven´s cavity and trays. In fact‚ Teka’s unique cleaning system solution works removes dirt entirely by using water vapor. It also repels dirt and thus keeps the oven pristine
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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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of this lab was to determine the standard heat formation (∆H°F) of MgO‚ using a calorimeter and determining the enthalpy of two reactions. Applying Hess’ law we were able to determine the standard heat formation of MgO. Introduction Energy exchanged in a chemical reaction can either be in the form of heat or light. If light is involved a glow is seen‚ if heat is involved the temperature of the system will change(lab manual page 35). The amount of heat exchanged under constant pressure is called
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neutralization reaction and magnesium oxide‚ MgO. Calorimetry is used to measure amounts of heat transferred to or from a substance.2 The difference of temperatures was used to calculate the heat energy given off by each sub-reaction. These values were solved by using Hess’s Law which determined the overall enthalpy changes of the neutralization reaction and MgO formation. Hess’s Law states that the heat evolved or absorbed in a chemical process is the same whether the process takes place in one
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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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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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many forms‚ such as heat‚ light‚ chemical energy‚ and electrical energy. The variables that thermodynamics can be used to define include temperature‚ internal energy‚ entropy‚ and pressure. Temperature‚ relating to thermodynamics‚ is the measure of kinetic energy in the particles of a substance. Light is usually linked to absorbance and emission in thermodynamics while pressure‚ linked with volume‚ can do work on an entire system. The entropy is the measure of the flow of heat through a system whose
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and Types of Energy Energy – is the capacity to do work or to transfer heats. Forms of Energy 1. Kinetic energy 2. Radiant energy 3. Thermal energy 4. Chemical energy 5. Potential energy Energy Changes in Chemical Reactions Heat – is the transfer of thermal energy between two bodies that are at different temperature. Thermochemistry – is the study of heat change in chemical reactions. Terms: System –
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