03 States of CO2 (Dry Ice) Science By the Horns Summer 2004.

Slides:

Advertisements

Similar presentations

Dry Ice Investigations

Advertisements

Before starting actual arc welding the student should be fully aware of the dangers involved. The high temperature arc and hot metal can cause severe.

Choose the appropriate tools or instruments and use relevant safety procedures to complete scientific investigations.

Kinetic Energy and Phase Changes. Diffusion Diffusion is the process by which molecules will move randomly in order to fill the space that they are in.

 Melting  Evaporation  Freezing  Condensation.

PHASE CHANGES SECTION 3.3.

Unit 3: Heat and Temperature

COOL ICE DR SAADOUNE. Dr Saadoune a b c direction 100 Å Helix pitch: 50 Å.

Liquid Carbon Dioxide Solid carbon dioxide is converted to liquid which quickly converts to gas.

Mr. Dawson’s Science Unit Created by: Mrs. Coliadis Oct

Properties of CO 2 Vanderbilt Student Volunteers for Science Training Presentation Spring 2013.

ENERGY FROM THE SUN Chapter 14.3 Pages Energy in the Atmosphere The sun is the source of ALL energy in our atmosphere. Three things that can.

Phase Changes Melting Vaporization Condensation Freezing Sublimation.

Solids, Liquids and Gases March 2006 By the end of this lesson you will know:  what a ‘material’ is  what we mean by ‘property’  what the properties.

 Dry ice is frozen Carbon Dioxide, or CO 2, which is a gas under standard temperature and pressure conditions. The atmosphere contains about.035% of.

Absolute zero is the lowest temperature possible. At a temperature of absolute zero there is no motion and no heat. Absolute zero occurs at a temperature.

Properties of Matter All forms of matter have properties.

States of Matter Day 4. Curriculum Big Idea: Changes in matter are accompanied by changes in energy. Big Idea: Changes in matter are accompanied by changes.

Changes of State Solid to Liquid to Gas and Back.

Changes of State Chapter 3 Section 3.

Kinetic Energy, Temperature, Phase Changes Chapter 13 Concepts.

What happens to substances when they change states of mater?

Lab Safety rules.

Safety First pp x-xiii Safety Rules 1.Always get permission to start experiment. 2.Read procedure carefully. 3.Be aware of all safety symbols. 4.Keep your.

Science By the Horns Summer INTRODUCTION TO STATES OF MATTER Science By the Horns Summer 2004.

Section 4: Changes in State

Phase Change Dec 3 rd. A Change of State Matter can change from one state to another The attraction between molecules and their rate of movement are two.

Why Do We Need Safety Rules?  Safety is our first concern when doing science experiments in this class. Our experiments may require the use of certain.

States of Matter! Molecules are vibrating. Molecules are moving faster. Definite volume No definite shape Definite volume Definite shape From CPO focus.

Solids & Liquids - small distance between particles - slow moving particles.

State Changes How matter changes forms. What is energy?  Energy is the ability to do work or cause change.

Phase Changes. Three States of Water Water is an abundant substance on Earth. It can be found as a solid, a liquid, and as a gas called water vapor. 1.How.

State Changes How matter changes forms Physical Science.

 A change of state is the conversion of a substance from one state to another  All changes of state are physical changes  The identity of a substance.

Changes of State. Is the change of a substance from one physical form to the other All changes of states are physical changes, this means that the identity.

◦ A change in state from a solid to a liquid occurring at a specific temperature.

Dry Ice Background Dry ice is carbon dioxide in its solid state. Remember…dry ice sublimates instead of melting. Carbon dioxide is found in the earth's.

Dry Ice Lab. Dry ice is the solid form of carbon dioxide gas. It is an interesting substance in that it sublimes, or changes directly from the solid to.

Lab Safety Ms. Aguillard Biology I Lafayette High School Summer 2009.

I. Phase Changes Matter and Energy Section 2.2. Phase Changes Gas Solid Liquid Amount of heat.

Page 53 Changes in State What are molecules? the smallest particle of a compound.

States of Matter Phase Change. Water Water exists on our planet in three states. Ice, water, and water vapor What causes water to be in one phase or another?

Changes of State Chapter 4-2. Changes of State A change of state is the conversion of a substance from one physical form to another. All the changes are.

Changes in State (phase changes) 1. Melting - solid to liquid a. Particles get more kinetic energy and begin rotating around each other. b. There isn’t.

What are changes of state?

Safety Symbols Wheel Use the safety wheel and record the notes next to each symbol. August 9, 2013.

Change of Phase part 3. Sublimation When go directly to the phase Object must in order to bypass liquid phase i.e. dry ice, moth balls, old air fresheners.

Earth Science States of Matter. Four states of matter Solids Liquids Gases Plasma Kinetic energy determines which state an element or compound is in.

Your life depends on it!! Essential Questions How do you stay safe in a lab? Why is safety important?

Water is made up of molecules. Water changes state (gas, liquid, solid) when it’s molecules are heated or cooled.

CHAPTER 2: MATTER. CHANGES OF STATE When matter changes from one state to another, we call this a phase change Thermal energy is related to the microscopic.

Section 3.3 Phase Changes.

Water Chemistry Mrs. Wisher. What is Chemistry?  Chemistry is the study of the properties of matter and how matter changes  Matter – the stuff that.

PHASE CHANGES Matter has the ability to move from one state to another.

Matter Definition  Anything that has mass and takes up space (has volume)  Matter is made up of atoms.

Melting Solid  Liquid Energy is added, particles speed up (endothermic) Melting Point: Temp. at which a substance melts Freezing Liquid  Solid Energy.

Lab Safety. Disposal Special disposal procedures need to be followed. Do not dispose of these materials in the sink or trash can Dispose of waste as directed.

Fill in the Chart MoleculesDefinite Shape ?Definite Volume? Solid Liquid Gas.

This model best represents which phase of matter? Solid, liquid, gas, plasma.

Chemical Bonds and Crystalline Solids 12/9/08. Chemical Bonds  Covalent Bond- a chemical bond formed by the sharing of electrons.  Ionic Bond-a chemical.

1 PHYSICAL PROPERTIES OF MATTER Boiling Points & Melting Points.

{ Science Starter #1 Take out a piece of paper, write the title, copy the question, today’s date, and begin 1) What is a physical property? Give an example.

CHEM 9 STATES OF MATTER. anything that has mass & takes up space Matter Mass the amount of matter an object contains.

Phase Change. Temperature is a term used to describe the average kinetic energy of the particles in a substance. In a sample of material at any temperature.

Created by: Mrs. Susan Dube  Solids can become liquids and liquids can become solids  Liquids can become gases and gases can become liquids  Solids.

Changes of State Change of state= conversion or a substance from one physical form to another All changes of state are PHYSICAL changes, no changes in.

How Cold Is Cold? I Bet It’s Colder Than You Think.

Presentation transcript:

03 States of CO2 (Dry Ice) Science By the Horns Summer 2004

Dry Ice is Solid CO2 The emphasis for these activities is to observe the physical process of phase change of CO 2 and H 2 O; Two important differences are: –CO 2 forms a solid at very lower temperatures (-78 o C), and; –CO 2 particles move from solid to gas (sublimation) without existing in the liquid state. As we’ll explore with the Chem Theater both of these properties are related to the low attraction between molecules.

Safety concerns Dry ice should never be touched directly. Do not inhale deeply the gas produced from dry ice. Make sure the room has adequate ventilation. Use dry ice only as directed or approved by instructor. When using a hammer to crush and produce small pieces for student use, be sure to: wear goggles; place dry ice on a solid surface; cover the dry ice with a cloth; handle dry ice pieces with gloves that protect hands from cold.

Dry Ice Activities From GEMS “Dry ice Investigations” Introduction to Observing Comparing Water Ice and Dry Ice Exploring Dry Ice Marge’s Systematic Observations Marge’s Experiments Choosing an Investigable Question Making an Investigation Plan Conducting Investigations Sharing Results