had to determine the heat exchanged when solid magnesium hydroxide is mixed with solid citric acid‚ using a coffee cup calorimeter. Given that citric acid is soluble in water is the property that makes this reaction possible. The first law of thermodynamics and Hess’s law are also present within this experiment. Knowing the difference between endothermic and exothermic reactions is also relevant. If the temperature goes down when energy is put in this means that the bonds are breaking. If the temperature
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reaching from Prudhoe Bay to the port of Valdez‚ and is subject to temperatures ranging from –73°C to +35°C. How much does the steel pipeline expand due to the difference in temperature? 8. (a) An ideal gas occupies a volume of 1.0 cm3 at 20°C and atmospheric pressure. Determine the number of molecules of gas in the container. (b) If the pressure of the 1.0-cm3 volume is reduced to 1.0 × 10–11 Pa (an extremely good vacuum) while the temperature remains constant‚ how many moles of gas
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In the the Chemical Enginneering Lab at CSULB there is a total reflux eight-stage glass binary distillation column at atmospheric pressure. The components that need to be separated are 1-propanol and 2-propanol. These two compounds are isomers with fairly close boiling points. They are separated based on their physical propertis. With the battch distillation might be almost
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cock C4 off its seat to equalize the pressure inside burette B with the ambient pressure. Then raise bottle L gently until water level in the burette coincides with the zero mark. This ensures that the burette now contains 100 ml of exhaust gas at atmospheric pressure.
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The Advanced Placement Examination in Chemistry Part II - Free Response Questions & Answers 1970 to 2007 Thermodynamics Teachers may reproduce this publication‚ in whole or in part‚ in limited print quantities for non-commercial‚ face-to-face teaching purposes. This permission does not apply to any third-party copyrights contained within this publication. Advanced Placement Examination in Chemistry. Questions copyright© 1970-2007 by the College Entrance
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calorimeter apparatus‚ Mesa Community College CHM152LL website‚ www.physci.mc.maricopa.edu/Chemistry/CHM152‚ accessed 1/11/2011. 3 Darrell D. Ebbing ‚ Steven D. Gammon‚ General Chemistry‚ 9th ed.‚ Houghton Mifflin‚ Boston‚ 2009‚ p. 426. 4 “Appendix C: Thermodynamic Quantities for Substances and Ions at 25°C” in Darrell D. Ebbing‚ Steven D. Gammon‚ General Chemistry‚ 9th ed.‚ Houghton Mifflin‚ Boston‚ 2009‚ p. A-10
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CHM130 Lab 4 Calorimetry Name: Mengqi Li Data Table: (12 points) ALUMINUM METAL Pre-weighed Aluminum metal sample mass (mmetal) 50.0 grams Temperature of boiling water and metal sample in the pot (Ti(metal)) dsdfa(Ti 90.0 C Temperature of cool water in the calorimeter prior to adding hot metal sample (Ti(water)) 17.0 C Maximum Temperature of water/metal in calorimeter after mixing (Tf) 47.0 C LEAD METAL Pre-weighed Lead metal sample mass (mmetal) 50.0 grams Temperature of boiling
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variety of ways‚ among them conduction‚radiation‚ and convection. The SI unit of heat is the joule. Heat can be measured by calorimeter‚ or determined indirectly by calculations based on other quantities‚ relying for instance on the first law of thermodynamics. In calorimeter‚ the concepts of latent heat and of sensible heat are used. Latent heat produces changes of state without temperature change‚ while sensible heat produces temperature change heat‚ energy that is transferred from one body to another
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Reaction Turbine Nithin Mannil 08d01001 Aim 1. To investigate the Torque/Speed and Power/Speed characteristics of Single Stage Reaction Turbine. 2. To determine the Isentropic Efficiency of a Turbine. 3. To compare the characteristics of a reaction turbine at different values of inlet pressure. 4. To compare the maximum shaft power vs pressure and isentropic efficiency vs pressure. Theory Turbines are machines which develop torque and shaft power as a result of momentum changes in the
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The air in a ship’s saloon is maintained at 19°C and is changed twice every hour from the outside atmosphere which is at 7°C. The saloon is 27m by 15m by 3m high. Calculate the kilowatt loading to heat this air taking the saloon to be at atmospheric Pressure = 1.013 bar. R for air =0.287 KJ/kg K. 6. 0.23kg of air has an initial pressure of 1.7 MN/m2 and a temperature of 200°C. it is expanded to a pressure of 0.34 MN/m2 according to the law pV 1.35 = Constant. Determine the
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