entropy of the system .If a compression or expansion of a gas takes place with no flow of heat energy either into or out of the gas - the process is said to be isentropic or adiabatic. The isentropic (adiabatic) process can be expressed with the Ideal Gas Law as: p / ρk = constant where k = cp / cv - the ratio of specific heats - the ratio of specific heat at constant pressure - cp - to the specific heat at constant volume - cv The isentropic or adiabatic process can also be expressed as
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fm Page 517 Friday‚ May 21‚ 2004 1:48 PM Table 17.2 Heats of Combustion at 25°C Substance ∆H (kJ/mol) Formula Hydrogen H2(g) Ϫ286 Carbon C(s)‚ graphite Ϫ394 Methane CH4(g) Ϫ890 Acetylene C2H2(g) Ϫ1300 Ethanol C2H5OH(l) Ϫ1368 Propane C3H8(g) Ϫ2220 Glucose C6H12O6(s) Ϫ2808 Octane C8H18(l) Ϫ5471 Sucrose C12H22O11(s) Ϫ5645 Table 17.2 lists heats of combustion for some common substances. The heat of combustion is the heat of reaction for the complete burning of one mole of
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‘Explain how Jason van Genderen represents the concept of belonging in his short film ‘Mankind Is No Island’ Belonging is an abstract and dynamic concept which can be defined as that which belongs to one‚ that which pertains to one or that which is connected with a principle or greater thing. Jason van Genderen’s short film ‘Mankind Is No Island’ (2008) was shot entirely on a Nokia phone on the streets of the New York and Sydney. Van Genderen represents the notion of belonging/not belonging through
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Sam Wood‚ a respected police officer in Wells‚ South Carolina‚ patrols the city every night. One night‚ after stopping at his usual diner for a snack‚ and discussing Negros unfavorably with Ralph‚ the night counterman‚ Sam finds a body in the middle of the highway. He reports the body‚ which is soon tentatively identified as that of Maestro Enrico Mantoli‚ the conductor and lead organizer of the city’s upcoming music festival. Bill Gillespie‚ the chief of police‚ is notified‚ and after his arrival
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Until the 1960s‚ the radio was the only significant electronics in an automobile. All other functions were entirely mechanical or electrical‚ such as the starter motor and the battery charging systems. There were no “intelligent safety systems‚” augmenting the bumper and structural members to protect occupants in case of accidents. Seat belts‚ introduced in the early 1960s‚ were for improving occupant safety and actuated completely mechanically. The driver or one of several mechanical control
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Techniques of Waste Heat Recovery Waste heat recovery is being more used more and more often today as it is becoming more effective‚ due to increasing energy prices‚ technological developments and a decrease in equipment costs. Heat recovery can be classified into three main strategies: recycling energy back into the process‚ recovering the energy for other onsite use and using it to generate electricity in combined heat and power systems. Once the system has been made as efficient as possible before
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Heat Stress in the Work Place! Eastern Kentucky University Heat Stress is the exposure to extreme heat or working in hot environments. Workers who are exposed to this may be at risk of heat stress. Heat Stress can result in occupational illnesses and injuries. “Heat stress can result in heat stroke‚ heat exhaustion‚ heat cramps‚ or heat rashes. Heat can also increase the risk of injuries in workers as it may result in sweaty palms‚ fogged-up safety glasses‚ and dizziness. Burns may
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Heat in physics is defined as energy in transit. It is symbolized with the alphabet Q. (Strong‚ Martin C. The Great Alternative and Indie Discography of Heat) It is mostly connected with different movements of atoms‚ molecules and other particles. These particles either consist of particles that are either hot or cold. High temperature bodies‚ are often caused due to the high heat transfer‚ which is created by chemical reactions‚ nuclear reactions‚ electromagnetic dissipation‚ or mechanical dissipation
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Rearranging gives Heat and Temperature Change: Specific Heat Capacity Q = mc T 4186 J = 1 kcal Ex: If 15 kcal of heat are added to 5.0 kg of silver‚ by how much will its temperature rise? Ex: An aluminum cup having a mass of 250.0 g is filled with 50.0 g of water. The initial temperature of the cup and water is 25.0 °C. A 75.0-g piece of iron initially at 350.0 °C is dropped into the water. What is the final equilibrium temperature of the system assuming that no heat is lost to the
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FORMAL REPORT ON HEAT CAPACITY RATIOS OF GASES ABSTRACT This report discusses an investigation of the heat capacities of Helium‚ Nitrogen‚ and Carbon Dioxide. To accurately determine experimental values for the heat capacity of each gas‚ the heat capacity ratio was calculated from measurements of the speed of sound in each gas. An apparatus designed to measure the wavelength and frequency of sound waves in each gas was used to determine the speed of sound as a frequency was passed through each
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