Copyright©2010 E3 Scholastic Publishing. Finally, because liquids are higher in energy than solids, and lower in energy than gasses the middle slanted line must be the liquid phase. How much energy is required to boil 9 moles of liquid water at its boiling point, and what is the temperature of the water vapor product? Which segment represents only the liquid phase? Phase change diagram answer key figures. The atmospheric pressure is lower at high elevation, so water boils at a lower temperature. Explain your answer. At which segment or segments is the substance exists in two phases? Potential energy of the substance remains constant during which segment or segments? 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 represents the substance as it is boiling?
- Phase change diagram answer key figures
- Phase diagram review worksheet answer key
- Phase diagram worksheet answer key
So, the potential energy of the molecules will increase anytime energy is being supplied to the system but the temperature is not increasing. What is the total length of the time that the substance exists only as a liquid? B C. Temperature ( o C) 50. Phase diagram worksheet answer key. When the kinetic energy is increasing (the temperature is also increasing) the substance is not going through a phase change. Heat is transferred from the water to the air, resulting in an increase in the temperature of the air. At which segment or segments is the substance average kinetic energy increasing? The higher the elevation, the denser water is. Example Question #10: Energy Of Phase Changes. The atmospheric pressure is lower at high elevations.
Phase Diagram Review Worksheet Answer Key
As condensation forms on a glass of ice water, the temperature of the air surrounding the glass __________. The flat areas of the graph represent areas in which heat is being added, but there is no corresponding increase in temperature. Therefore, when the potential energy is increasing is when the molecule is changing phases. When vapor pressure is equal to the atmospheric pressure, water boils. What is the phase or phases of the substance during segment C? Therefore the substance is boiling during segment 4. There is a lower heat of fusion at higher elevation. 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. Is impossible to determine. The temperature remains constant throughout a phase change, thus the final temperature would still be 100°C. How much heat must be added to raise a sample of 100g of water at 270K to 280K? Phase diagram review worksheet answer key. Boiling is a phase change from liquids to gas. The specific heat capacity of water is, and water's heat of fusion is. Set E: Phase change diagram Objective: To test your ability to interpreted phase change diagrams.
Phase Diagram Worksheet Answer Key
Hydrogen bonds are easier to disrupt at high elevation. Page 19 - Surviving Chemistry Workbook Preview. The enthalpy of vaporization gives the amount of energy required to evaporate a liquid at its boiling point, in units of energy per mole.
So, the kinetic energy is increasing during segments 1, 3, and 5. In the given heating curve, which segment(s) correlate to a mixture of phases? The beginning of segment 5. 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. Water has a higher vapor pressure at high elevation.
Therefore there is a mix of molecules during segments 2 and 4. In this case it is labeled as segment 3. Describe the change in kinetic energy of the substance during segments A and segment B? The total energy requirement to heat a given amount of steam is found by mulitplying the the number of moles to be vaporized by the energy of vaporization per mole. 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44. The given heating curve represents a substance in phases solid, liquid, and gas. The substance is losing heat at a rate of 155 Joules per minute. 140 C. Temperature ( o C) 120 D. 80. As a substance condenses from the gas phase to the liquid phase, it loses energy in the form of heat loss.