Physical Chemistry Lec 1 PDF

Physical Chemistry Lec (1) Matter Dr. Gehad Elgarhy 01228091753 Dr. Gehad 01228091753  Lec (1) States of matter Solid Liquid Gas Plasma Definite shape...

Physical Chemistry Lec (1) Matter Dr. Gehad Elgarhy 01228091753 Dr. Gehad 01228091753  Lec (1) States of matter Solid Liquid Gas Plasma Definite shape Indefinite shape Indefinite shape Like gases have an indefinite Definite volume. definite volume Indefinite volume. shape Indefinite volume. Particles of solids: Particles of liquids: Particles of gases: A plasma is:  tightly packed  tightly packed but  are very far apart  The fourth state of matter  vibrate are far enough  Move freely.  an ionized gas  do not move apart to slide over  Separated with  the common state of matter from place to one another. no regular  Very good conductor of place  Vibrate, move arrangement. electricity and is affected by  Close together magnetic fields. with no regular  composed of electrical charged arrangement. particles  Found in :  Flames, lightening, aurora,  The sun is an example as star in its plasma state  Cold plasma and cold plasma pen Matter can be classified as Pure substance mixture ) the same composition Has homogeneous mixture heterogeneous mixture Has the same properties Has different properties Elements Compounds Cannot be broken down Chemically into simpler can be chemically broken substances. down into elements. Ex. Na, He, O2, N2, H2 Ex. water Dr. Gehad 01228091753  Which of the following is a homogeneous mixture? A. Pure water B. Gasoline C. Jar of jelly beans D. Soil E. Copper metal Phase changes: Term for Phase Change Description of Phase Change Heat Movement During Phase Change Melting Solid to liquid Heat goes into the solid as it melts Freezing Liquid to solid Heat leaves the liquid as it freezes Vaporization Liquid to gas Heat goes into the liquid as it vaporizes (boiling &evaporation) Condensation Gas to liquid Heat leaves the gas as it condenses Sublimation Solid to gas Heat goes into the solid as it sublimates Separation of mixtures: Mixtures can be separated into pure substances by:  Distillation  Filtration Dr. Gehad 01228091753 Physical properties of matter are classified into: Extensive properties Intensive properties Depend on the amount of substance Independent on the amount of substance Ex. Mass , Volume Ex. Boiling point, melting point, density NOTE: Chemistry: is the study of matter and its transformations. QUIZ Explain  Properties of matter?  Homogenous solution?  Heterogeneous solution?  Element?  Compound?  Melting point?  Boiling point?  Solubility? Dr. Gehad 01228091753