Set E: Phase change diagram Objective: To test your ability to interpreted phase change diagrams. As a substance condenses from the gas phase to the liquid phase, it loses energy in the form of heat loss. The flat areas of the graph represent areas in which heat is being added, but there is no corresponding increase in temperature. What is the total length of the time that the substance exists only as a liquid? In this case, gas phase is the highest energy phase, and liquids is the next highest. Copyright©2010 E3 Scholastic Publishing.
The temperature remains constant throughout a phase change, thus the final temperature would still be 100°C. Topics for each state include: pressure conversions, relationship between Kelvin and kinetic energy, phase changes, intermolecular forces, types of solids, phase diagrams and much more! The specific heat capacity of water is, and water's heat of fusion is. At which segment or segments is the substance average kinetic energy increasing? The substance is losing heat at a rate of 155 Joules per minute. The atmospheric pressure is lower at high elevations. However, in the event of a phase change (water melts at 273K), the heat of fusion or vaporization must be added to the total energy cost. Which segment or segments represents a time when the substance is in one phase? Using the heating curve, determine which segment(s) relate to an increase in potential energy.
In this case it is labeled as segment 3. What is the melting point of the substance? Therefore we are looking for a segment that is flat (because the potential energy is increasing) and that is between the liquid and gas phases. When the kinetic energy is increasing (the temperature is also increasing) the substance is not going through a phase change. At which segment or segments is the substance exists in two phases? 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21. Describe the change in kinetic energy of the substance during segments A and segment B? Is the total length of time it took for the substance to change from liquid to solid? Therefore only the segments that are at an incline will have the substance in just one phase.
Therefore the kinetic energy will be the highest when the temperature is the highest. All AP Chemistry Resources. Which segment represents only the liquid phase? Which segment represents the substance as it is boiling? Therefore there is a mix of molecules during segments 2 and 4.
How much heat did the substance lose to completely change from liquid to solid? When kinetic energy is increasing molecules are simply moving faster. The beginning of segment 5. When vapor pressure is equal to the atmospheric pressure, water boils. 140 C. Temperature ( o C) 120 D. 80. Therefore the potential energy is increasing during segments 2 and 4. States of Matter - Intermolecular Forces, Kinetic Molecular Theory, Temperature, Pressure, Solids, Liquids, Gases, Distance learning, Remote learningThis bundle of lesson plans will teach your students about Kinetic Molecular Theory for solids, liquids, and gases. Heat is transferred from the water to the air, resulting in an increase in the temperature of the air.
Remember, temperature is a measure of the average kinetic energy. Using the heat curve, define the segment time(s) that the kinetic energy of the substance is increasing. Is impossible to determine. Step-by-step PowerPoint notes will guide your stu.
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