# Physics lab report 2.docx - Lab 2 Phase Changes Greta...

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Lab 2: Phase Changes Greta Gonzalez Abstract This experiment is about the study of the phase changes as water is heated from solid to water Vapor. Phase transitions, such as the transfer of liquid water to steam, are an important example of a mechanism in which there is a major difference of internal energy with volume at constant temperature. Phase transitions involve either the addition of heat energy (melting, evaporating and sublimating) or the subtraction of heat energy (condensation and freezing). Increasing the sum of heat energy normally induces a difference in temperature. Objectives a) To understand how the temperature of substances change as heat is applied. b) To understand how the temperature of substances change when they go through a phase change. c) To measure and compare the freezing and melting temperatures of water. Introduction When the heat is applied to the ice, it melts and shifts to the water. When the water heats up, the temperature increases. Eventually, the water heats and transforms into a vapor (gas). The material has undergone two step shifts. The temperature at which these phase changes occur is a significant feature. The relationship between heat energy and the action of the material is also important for understanding the difference between heat and temperature. Procedure 1. Start Virtual Physics and pick Step Changes from the assignment list. The lab will be opened in the Calorimetry Laboratory. 2. The experiment will be set up with a coffee cup of calorimeter lined with 65 mL of room temperature water on the lab bench. There's a beaker on the table next to the balance. Tap on the balancing field and drag the beaker to the balance and keep the balance. Drag the beaker back to the spotlight on the table and press the Zoom Out button. Click the green