States of Matter

Demonstration Movement

States of Matter Solid Liquid Gas Strong No yes yes Move Slightly Particle Picture Particle Movement Intermolecular Forces Compressible Definite Shape Definite Volume Solid Liquid Gas Move very little Vibrating (low energy) States of Matter Strong No yes yes Move Slightly (moderate energy) Some what strong slightly no yes Move Rapidly (high energy) Weak no no yes

Phase Change Diagram Temperature is a measure of kinetic energy! point in which a liquid and its vapor (gas) can coexist. the temperature and pressure at which all three phases of that substance coexist Temperature is a measure of kinetic energy! As temperature increases: molecules move faster (more Kinetic Energy) intermolecular forces become weaker

Phase Change Diagram Kinetic Energy- movement of the atoms Temperature is a measure of kinetic energy! Kinetic Energy- movement of the atoms Potential Energy- stored energy INCREASE temperature = INCREASE energy! Intermolecular forces get weaker! KE PE Evaporation Gas PE KE Condensation Melting Liquid DECREASE temperature = DECREASE energy! Intermolecular forces get stronger! KE Freezing Solid

Phase Change Diagram Temperature is a measure of kinetic energy! point in which a liquid and its vapor (gas) can coexist. the temperature and pressure at which all three phases of that substance coexist Temperature is a measure of kinetic energy! As temperature increases: molecules move faster (more Kinetic Energy) intermolecular forces become weaker

3 States of matter ______- matter that can not flow (definite shape) and has definite volume. Example:

3 States of matter _______- definite volume but takes the shape of its container (flows). Example:

3 States of matter ____- a substance without definite volume or shape and can flow. _______- a substance that is currently a gas, but normally is a liquid or solid at room temperature. (Which is correct: “water gas”, or “water vapor”?) Example:

Three Main Phases

________ _______ ____ ________ Solid Liquid Gas

Heat Transfer and Phase Change Diagram