What Factors Most Affect Evaporation? Intermediate-Level Science Projects Which Materials Insulate Best Against Windchill? Do Clouds Tell Us What Weather Is Coming? What Factors Most Affect Evaporation? Evaporation of a substance such as water occurs when the molecules in a liquid state absorb enough heat energy to vaporize into a gas. The heat energy‚ which causes the molecules to move‚ is called kinetic energy. The water molecules remain the same during this change‚ except that they’re
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Introduction 2. Theory 3. Objectives of project 4. Experiment 1 5. Experiment 2 Theory Evaporation is the process whereby atoms or molecules in a liquid state gain sufficient energy to enter the gaseous state. The thermal motion of a molecule must be sufficient to overcome the surface tension of the liquid in order for it to evaporate‚ that is‚ its kinetic energy must exceed the work function of cohesion the surface. Evaporation therefore proceeds more quickly at higher temperature and in liquids with lower
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Name____________________ Comparing Rates of Evaporation Several factors determine how fast a sample of liquid will evaporate. The volume of the sample is a key factor. A drop of water takes less time to evaporate than a liter of water. The amount of energy supplied to the sample is another factor. In this lab‚ you will investigate how the type of liquid and temperature affect the rate of evaporation. Problem: How do intermolecular forces affect the evaporation rates of liquids? Pre-Lab: Read the
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Aatreya Chakravarti Ms. May April 22th‚ 2013 Chemistry Honors Comparing Rates of Evaporation Pre-Lab Questions Chakravarti 1 2. What is evaporation? Describe what happens at the molecular level during evaporation. Evaporation is the process by which molecules undergo a change in state from a liquid to a gas. At a molecular level a molecule needs a set energy level to evaporate. When molecules collide they transfer energy. Eventually one molecule will get the energy required to change state
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determine the amount of impurity‚ in the form of oil‚ in water using the method of solvent extraction‚ also known as liquid-liquid extraction‚ a method of separating two materials with different physical and/or chemical properties. Two methods of evaporation will be used to finally determine the concentration of impurity- one using an explosion-proof hot-plate‚ and one using a rotovap. III. Theory Fig. 1a+1b. Figure 1a shows how water and oil separate in the separatory funnel‚ while figure 1b shows
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Integrating Science and Mathematics Many educators from around the United States have began to support and understand the connection between math and sciences and how important it is to integrate the two in their classroom lesson plans. These teachers understand how integrating math and science This can create great efficiency in their teaching method. The educator are teaching the two subject with the understanding that their student’s real life is not divided into subjects‚ so how will
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and distillation (boiling). If salt and sand are a mixture‚ then we can separate them by physical processes. Materials Ring with ring stand Funnel Wire triangle Stirring rod Filtering paper Beakers (400mL and 250mL) Rinse bottle Evaporation dish Digital balance Calculator Hot plate (stove top) Salt/sand mixture Procedure Weigh your dish(in grams) and filter by there selves and write it down. Put your wire triangle on your ring attached to the ring stand . Place the funnel
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things with different filters. Extremely fine filters will separate grains of sand from water. Evaporation is the method of separating a substance with heat. Evaporation works when you take a substance‚ heat it up and let one of the components evaporate so you’re left with the residue which is the other component. In India‚ citizens would often boil saltwater to obtain salt. The problem with evaporation is that you can only get one component from the substance and it’s usually the one with the higher
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SAMPLE RESEARCH PAPER FOR SCIENCE FAIR Ms. Willis Excellent Evaporation Science Fair Research Paper By: Suzie Science Ms. Willis’ Class December 16‚ 2008 Background Information Liquids are all around us. Every day we drink and eat items that contain liquids‚ we use liquids to clean ourselves and our belongings and liquids can even be found in the places that we would not expect‚ like televisions. When someone watches liquid over time‚ an interesting thing begins to happen. The liquid
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report Anita Dey Thursday 8am Abstract: We recently performed a liquid nitrogen experiment in finding the Latent heat of the substance. We isolated two parts of the experiment in order to find out how much evaporation of the liquid nitrogen was from the surroundings B and how much evaporation from the electricity G. 1. When a substance is undergoing a phase transition‚ more heat (energy) is being added to the Substance but its temperature (a way of measuring its energy) is not changing. Where does
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