StudyXY
RegisterLog in

PhaseChangesSEKey

Explore the behavior of water molecules in solid, liquid, and gas phases. Observe how molecular motion and arrangement change with state. Great for visualizing states of matter!

Daniel Miller
Contributor
4.9
44
5 months ago
Preview (2 of 5 Pages)
100%
Purchase to unlock

Page 1

PhaseChangesSEKey - Page 1 preview image

Loading page image...

Phase ChangesAnswer KeyVocabulary:altitude, boil, boiling point, freeze, freezing point, gas, liquid, melt, melting point,phase, solidPrior Knowledge Questions (Dothese BEFORE using theGizmo.)/Atote:The purpose of these questions is to activate prior knowledge and get students thinking.Students are not expected to know the answers to the Prior Knowledge Questions.]Marla wants a hard-boiled egg for breakfast. The recipe says boil water, then lower the heat sothe water is simmering. But Marla is in a rush, so she keeps the heat on high as the egg cooks.Do you think the egg will be done faster if the heat is kept on high as the water boils?Answers vw// vary[Correct answer is no.]Explain your answer. Bcp/anations vw// vary.[The boiling temperature of water is constant, s othe egg will take the same amount of time to cook no matter what the burner is set to.]GizmoWarm-upInthePhase ChangesGizmo, selectMicro view.Noticethe nitrogen (*?»), oxygen ($), and water ( P ) molecules.Tostart, create ice. Set Add/removeheat energyto -200J/s, click Play (* ), and then clickPause () when thecontainerisabout half ice,halfwater. SetAdd/removeheat energyback to0J/s, and then clickPlay.1.Observe water molecules in thesolid(ice),liquid(water), and gas (air) phases.A. In which phase(s) do molecules move freely? Gas anOquidB. Inwhichphase(s) are molecules held together?SolidC. What do you notice about the positions of the ice molecules? They form hexagons.When frozen, water molecules form a hexagon (six-sided shape) pattern.2.Click Reset {■s ):and select Macro view. Set the Ice volume to 25 c m3.A. In which phase(s) is water held in a defined shape? SofidB. Inwhich phase(s) does the water take the shape of the container? L/qutd and gas

Page 2

PhaseChangesSEKey - Page 2 preview image

Loading page image...

Activity A:Phase changesGet the Gizmo ready:•Click Reset ( o ) and select Macro view.•Set the Water temperature to 10 “C.•Set the Ice volume to 0 cm3.;J■IQuestion: How i s temperature related to phase changes?1.Predict: Based on your prior knowledge, predict the following: Precficfrcvis vwflvary.A. At what temperature will water change from a liquid to a solid (freeze)?B. At what temperature will water change from a solid to a liquid (melt)?C. At what temperature will water change from a liquid to a gas (boil)?2.Investigate: Use the Gizmo to explore phase changes. Use the Addfremove heat energyslider to control the water temperature. Record your observations in your notes, then answerthe questions below:A. At what temperature does water freeze? 0 °CB. At what temperature does ice melt? 0 °CC. At what temperature does water boil? JOO °CThis is the freezing pointThis is the melting point.This is the boiling point3.Observe: Set up the Gizmo to observe freezing. What do you notice about the temperaturewhile the water is in the process of freezing? The temperatureremains constant.4.Explore: Use the Gizmo to investigate melting and boiling. Does the temperature changewhile either of these phase changes is occurring? Vo, thetemperature is constant.5.Interpret: Select the GRAPH tab to see a graph of temperature vs. time. Click thebuttonuntil the whole graph is visible. What does the graph look like during a phase change?During the phase changes, the graph showsa flattine.6.Extend your thinking: Why do you think the temperature does not change much during aphase change? If possible, discuss your answer with your classmates and teacher.Answers wifl vary.[During melting or boiling, heat energy is used to break the intermofecularforces (intermofecufar bond) between molecules rather than speed them up. Duringfreezing, heat energy is released by the formation of intermofecufar bonds betweenmolecules.]
Preview Mode

This document has 5 pages. Sign in to access the full document!

Study Now!

XY-Copilot AI
Unlimited Access
Secure Payment
Instant Access
24/7 Support
Document Chat

Document Details

Subject
Chemistry

Related Documents

View all
Solved Assignments

Angeline Cabrera Gizmo Ionic bonds Lab

Learn how atoms form ionic bonds by sharing or transferring electrons in this interactive Gizmo activity. Explore electron behavior, valence electrons, and bonding between metals and nonmetals like sodium and chlorine.

Solved Assignments

Covalent Bonds (Gizmo)

Students learn about covalent bonds where atoms share electrons to complete their outer shells, using examples like exchanging markers to understand electron sharing for stability.

Solved Assignments

9.0 Mole Ratios POGIL 1

Sauer Condiment is a tangy, probiotic-rich fermented food that supports gut health, boosts immunity, and adds bold flavor to meals like salads, sandwiches, and more.

Class Notes

Element Builder Gizmo Exploring Atoms and Electron

A hands-on exploration using the Element Builder Gizmo to understand atomic structure, subatomic particles, electron arrangement, and periodic table organization through interactive learning, diagrams, and critical thinking activities.

Solved Assignments

Naming Molecular Compounds

This worksheet teaches students how to name molecular compounds using prefixes and formulas. It emphasizes the importance of precise chemical naming and explores covalent bonding between nonmetals through examples like CO and CO₂.

Solved Assignments

Balancing Chemical Equations Phet Key

This worksheet guides students through a chemistry simulation on balancing chemical equations. It includes questions on molecule and atom counts, reaction types, and helps develop understanding of conservation of mass through interactive exploration.

Solved Assignments

H Gizmos Worksheet CalorimetryLab

This calorimetry lab explores how heat transfers between substances. Students measure temperature changes of copper and water to determine specific heat capacity, showing that water resists temperature change more—indicating a higher specific heat.

Solved Assignments

Gabrell Talavera ElectronConfiguration Gizmo

Explore electron configurations with a fun bus seating analogy! Learn key chemistry terms and principles as electrons “board” orbitals, revealing patterns in atomic structure and behavior.

Solved Assignments

LUCA SHIPOSH Element Builder Gizmo

Explore atoms with the Element Builder Gizmo! Learn how adding protons, neutrons, and electrons changes an atom’s identity, structure, charge. Discover how protons define the element and electrons orbit the nucleus. Great intro to atomic structure

Solved Assignments

Hao Lin Gizmo Phase Changes Student Exploration WS

Explore how molecules behave in solid, liquid, and gas phases. Learn about phase changes like melting, boiling, and freezing using the Gizmo simulation. Understand molecular motion and shape.