May 01, 2015 · The cooling curve of stearic acid is shown below. 6 From the graph, we can infer that A at the time interval t1 to t2, heat is absorbed from the surroundings B at time t2, all the stearic acid exists as a solid C at the time interval t2 to t3, crystals of stearic acid are formed D at the time interval t2 to t3, all the stearic acid exists as a ...
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Let's compare sugar in water (H 2 O) to sand in water. Sugar dissolves and is spread throughout the glass of water. The sand sinks to the bottom. The sugar-water is a homogenous mixture while the sand-water is a heterogeneous mixture. Both are mixtures, but only the sugar-water can also be called a solution. Can anything be in a Solution ...
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• The phase change of water from a solid to a liquid:to a liquid: A. is Endothermic. B. is an example of meltingis an example of melting. C. has a zero slope on the heating curve. D. is all of the aboveis all of the above.
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Water has the ability to be a liquid, solid or gas depending on the temperature at which it is found. Each molecule of water is made up of 2 hydrogen and 1 oxygen bonded together. Water is attracted to other water molecules like magnets. This is called cohesion. Part 1 Materials: Penny Water Medicine Dropper Graduated Cylinder Methods: 1.
Dec 27, 2005 · What is a water budget? A water budget reflects the relationship between input and output of water through a region. The water balance graph shows precipitation and potential evapotranspiration both as line graphs. Thus we have a direct comparison of supply of water and the natural demand for water.
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burner. Heat the test tube in the water bath until the solid melts and the temperature climbs to at least 90°C. Make sure the bulb of the test tube is in the liquid and there is no solid remaining. 3. After the solid has melted, call your teacher to lower the iron ring and remove the hot water bath so the test tube can cool in air. 4.