representation of a dry refrigeration cycle Refrigerant fluid choice: We now turn our attention to the fluids. Usually‚ one tends to pick pL as low as possible‚ but not below atmospheric pressure. Thus‚ the refrigerant chosen needs to have a normal boiling point compatible with the lowest temperature of the cycle (usually 10oC lower than the system one wants to cool). The higher pressure needs to be compatible with the cooling
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is difficult‚ give oxygen INGESTION: If swallowed‚ induce vomiting immediately after giving two glasses of water. Never give anything by mouth to an unconscious person. | Physical and Chemical Properties | Melting Point: | 261°c | Specific Gravity | 1.28 | Boiling Point: | Information not available | Percent Volatile by Volume: | 0 | Vapor Pressure: | Information not available | Evaporation Rate: | information not available | Vapor Density: | 1.29 | Evaporation Standard: | not available
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APPARATUS The apparatus used during the experiment are as follows; * Marcet boiler * Bunsen burner * Gauge pressure * Thermocouple * A mercury-in-glass thermometer * A stop watch PROCEDURES * I heated the boiler with both taps open. When boiling started‚ I closed the side tap. * I allowed the steam to escape from the top tap for one minute I closed the top tap. * I heated the boiler with all taps close and took readings of temperature for the selected
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follow all guidelines (number of sentences/showing all calculations) and to provide the correct metric units of measure. All questions are 5 points (1 point for sentence number /units). 1. A student collected the following data for a fixed volume of gas: Temperature (⁰C) Pressure (mm of Hg) 10 726 20 750 40 800 70 880 100 960 150 ??? Fill in the missing data point. Show all calculations leading to an answer. 2. You are given a clear solution of KNO3. Using 3 – 4 sentences (in your own words) explain
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engines. Nitromethanes physical appearance is colorless viscous liquid‚ with nasty characteristics odor. The physical properties are the following: Boiling point is 101 degrees Celsius‚ melting point is -29 degrees Celsius‚ relative density (water=1): 1.14‚ vapor pressure ‚ kPa at 20 degrees Celsius :3.7‚ relative vapor density (air=1): 2.1‚ flash point: 35 degrees Celsius‚ c.c. auto ignition temperature: 417 degrees Celsius‚ and explosive limits volume % in air: 7.3 -63. Toxic properties for
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Chemical Engineering Design and Professional Skills B Second assignment M A N U F A C T U R E O F S T Y R E N E Assignment 2 – Monday 28/01/13 You have a provisional flowsheet for a process to manufacture 30 ton/h of styrene from ethylbenzene. This is described below. (It may differ in some details from the one you developed last term – but if so‚ you should use the version described here‚ so that all groups are working with the same‚ correct process.) For Assignment 2 of
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Temperature is basically a measure of the molecular kinetic energy of a substance. (Or how fast the molecules are moving). Therefore reference points upon which compare molecular activities or temperatures are needed. The freezing point and boiling points of water are used as 32OF or 0OCis the freezing point and 212OF or 100OC is the boiling point. Water is a basic necessity for the life forms here on Earth. At a given moment‚ only about 1/100‚000 part of the earth’s supply of water is found
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claim). -The Salicylic acid that I obtained had a melting point range around 157-158 degrees Celsius for Part A. For Part B the melting point range was 156-157.5 degree Celsius. Part B‚ I would say the sample is less pure because of the notion that impurities lower the melting point. Since part A ‘s melting point was higher and closer to the melting point of the pure sample‚ it was more pure. The pure Salicylic acid that I got the melting point for had a range from 158-159 degrees Celsius. The impure
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atom belonging the Third period‚ and group 6. It has an atomic number of 16. Its molar mass is 32.065 g (5 significant figures). It is a solid at room temperature‚ with a lemon yellow‚ non-metallic appearance. It has a melting point of 115.21 degrees Celsius and a boiling point of 444.6 degrees Celsius. It has a total of 18 isotopes. When onion cells are broken‚ the sulphur compounds found in the onion cells break down into other compounds when in contact with surroundings. When the sulphur compounds
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the space provided‚ and turn the assignment in to your instructor. 1. What is the slope of the line in the graph below? Show your work. Answer: To find out the slope‚ you must first take two separate points on the graph‚ such as (-5‚-1) and (0‚1). Then‚ it’s a simple matter to use the equation [pic] to find the slope: [pic]= [pic] 2. What is the slope of the line represented by the table of values below? How do you know? |x |y
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