Chapter 1 Introduction to Chemistry Tammilee Kerr

What is Chemistry? The study of the substances that makes up matter and the changes that they undergo to form new substances Examples:

Fe2+ Fe3+ Branches of Chemistry Organic Chemistry Inorganic Chemistry Study of chemicals that containing Carbon Inorganic Chemistry Study of chemicals that generally do not contain carbon Fe2+ Fe3+

Branches of Chemistry Cont’d Physical Chemistry Deals with the mechanism, rate and energy transfer that occurs when matter changes. Analytic Chemistry Focuses on the composition of matter

? Fe2+ (Ferrous) Branches of Chemistry Cont’d Biochemistry – Making the link Study of reactions and processes in organism Energy How much energy is made ? Fe2+ (Ferrous) + Binds O2

What is Matter? Examples: So what is Mass? E.g. All matter has a mass Matter is anything that has mass and occupies space Examples: So what is Mass? Mass is the measurement that indicates how much of a substance is in matter Usually measured in Kilograms (kg) or grams (g) E.g. All matter has a mass

Is Mass & Weight the same? What is Weight? Weight Measures: The amount of substance in matter (mass) and The earths gravitational pull on that matter Is Mass & Weight the same? No! E.g. A Human on Earth Vs. a Human on the Moon http://education.ssc.nasa.gov/mvw_intro_video.asp

Summary of Mass vs. Gravity So is Mass & Weight the same? …… No! Weight is dependent on gravity Formula: Weight = Mass x gravity Gravity on earth: 9.807 m/s² Gravity on the moon: 1.622 m/s² Summary of Mass vs. Gravity The mass of an object is the same everywhere Weight depends on the effect of gravity & varies according to location. Mass can never be zero Weight can be zero if no gravity acts upon an object

****Weekend Reading ***** Read Chapter 2 for Monday (09/02/16)