Mlungisi Maphunta 147565 Bachelor of Science II C202 Practical Report Group 15 Experiment8 COLLIGATIVE PROPERTIES: FREEZING POINTDEPRESSION AND MOLAR MASS Group Members Mncedisi Mngomezulu Sphiwe ndwandwe Thandeka Mpila EXPERIMENT 8: COLLIGATIVE PROPERTIES: FREEZING POINT DEPRESSION AND MOLAR MASS: AIM The aim of the experiment is to become familiar with the colligative properties and to use them to determine the molar mass of a substance. THEORY A solution consists primarily of solvent and
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important in atmospheric processes * Oxygen (O2) - 21% Variable Gases * Water Vapor (H2O) * Carbon Dioxide (CO2) * Ozone (O3) Water Vapor * An invisible gas * If you can see it it's not water vapor!!! * Gaseous phase of water * Three States of Matter * Solid (ice), liquid, and gas (water vapor)
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the bottle is the same before the experiment began. Therefore the only force that would cause the egg to enter the bottle is gravity and the diameter is too small for just that force to work. 2. According to Gay-Lussac's law, the pressure of a gas of fixed mass and fixed volume is directly proportional to the gas's temperature. When we changed the temperature of the air inside the bottle, we changed the pressure of the air inside the bottle because the volume of air is constant therefore the
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wet, it crackled before lighting. This phenomenon occurs because the oxygen in the air trapped inside the graduated cylinder was used by the fire so the water rose around it. The properties of matter that were demonstrated was solid, liquids, and gas thanks to changing temperature. The concepts that the demo shows is that when the oxygen is depleted from the air, the water becomes less dense and rises around the
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Assignment # 2 Petroleum Engineering Thermodynamic 1. PCB/PDB 1043 A piston–cylinder device initially contains 0.07 m3 of nitrogen gas at 130 kPa and 120°C. The nitrogen is now expanded to a pressure of 100 kPa polytropically with a polytropic exponent whose value is equal to the specific heat ratio (called isentropic expansion). Determine the final temperature and the boundary work done during this process. 2. A frictionless piston–cylinder device contains 2 kg of nitrogen at 100 kPa and
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1. Processing of Coffee Beans a. Roasting In this process potential tastes of green coffee beans are brought up totally. Main aim in roasting is losing humidity and solid matters. In pink-roasted 3-5% humidity, roasted 5-8% humidity and in hard roasted 8-14% humidity is losing. For this operation roasters which have 188-282 C temperature, are used for 12-30 minutes. Roasting coffee may put on the market after special packaging operation. b. Extraction After roasting coffee beans are ground and
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temperature b) suction presuure > vapor pressure of liquid at that temperature c) suction pressure = vapor pressure d) suction pressure = developed head 3. Centrifugal pumps are normaly used for pumping a) Gas b) Liquids c) Gas & Liquid mixture 4. Check valve is used for a) Very precise control of flow b) Unidirectional flow c) Multidirectional flow d) None of these 5. Purpose of relief valve in a reciprocating pump is to
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Unit 2 Assignment 2 09/30/2014 Cold plasma therapy is the process of using room temperature ionized gas to treat cancer. Normally generated at high temperatures recent advancements have led to progress of atmospheric plasma. This advancement has been said to have the ability to completely remove cancer and tumors. Also a great advantage of cold plasma therapy is that it eradicates all cancer cells while not damaging normal cells. This treatment opens many doors and possibilities enabling better
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IA Problem: What is the affect of changing temperature in a reaction? Hypothesis: The higher the temperature, the more heat will be produced which will cause the potato slurry to denature quicker, because heat breaks down enzyme. Variables: Independent- temperature potato slurry is placed in Dependent- rate of reaction, potato slurry, H2O2 Controlled- Same size test tubes and syringes, amount of potato slurry in test tubes, amount of h2o2 put in potato slurry, amount of distilled
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Do all liquids evaporate at the same rate? Evaporation is when a liquid turns into a gas. The molecules move and vibrate so fast that they go into the atmosphere as molecules of water vapor. Evaporation is very crucial in the water cycle. The hotness from the sun powers the evaporation procedure. Water starts to evaporate at about 32 degrees Fahrenheit but it occurs gradually. As the temperature rises, the evaporation starts happening quicker. So the warmer it is the faster evaporation happens. Evaporation
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