Chapter 2Energy and Matter

Chapter 2Energy and Matter - Ch. 2: Matter and Energy...

Info iconThis preview shows pages 1–12. Sign up to view the full content.

View Full Document Right Arrow Icon
3/24/11 Ch. 2: Matter and Energy Notes: - the textbook starts with Energy , we are starting with Matter - some of the calculation in this chapter are not as important as the concepts (see lecture and Suggested Problems for clarification) 3 Please always check Masteringchemistry.com for homework due dates!
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
3/24/11 Suggested Problems for Ch. 2: Energy and Matter Concept Checks : Energy: 1,4 Matter: 6, 7,8 Sample Problems : Energy: 4,5,9 Matter: 10,11 Ch. 2: Matter and Energy Classification of matter States and Properties of matter Energy Specific heat Energy and Nutrition
Background image of page 2
3/24/11 Classification of “matter” Matter is anything that has mass and volume ! CHEMISTRY” is the study of matter , its composition and its changes and interactions with other
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
3/24/11 Matter Pure Substances (definite and constant composition) Mixtures (variable composition; components CAN be separated by physical methods ) Elements (Na, K, O, Cl, Cs) Compounds (NaCl, H2O, CH4) Heterogene ous mixtures Homogeneous mixtures (solutions) 2.5 Classification Chemical processes can break down compounds into their elements Mixtures can be separated by physical
Background image of page 4
3/24/11 STATES of matter… PROPERTIE S of matter… - Nonuniform composition ! - properties are NOT the same throughout - same properties throughout (look uniform) - One phase only, like salt - All are on the PERIODIC TABLE!!! - Need to learn symbols and - COMBINATIONS of different ELEMENTS! - NaCl, H2O,
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
3/24/11 MIXTURES two or more substances physically mixed , so Composition of components can vary, it is still a mixture Components retain their characteristic properties May be separated into pure substances by “ physical Examples: salt water, water and food coloring, dirt, jello, blood MIXTURES can be classified as HOMOGENEOUS (uniform composition throughout) or HETEROGENEOUS (not
Background image of page 6
3/24/11 HOMOGENEOUS (one phase, same properties throughout, like salt water) or HETEROGENEOUS (may be different phases, properties are NOT the same throughout, like MIXTURES – classify as either :
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
3/24/11 These are all mixtures: Are they homogeneous or Orange jello Orange jello with pineapple
Background image of page 8
3/24/11 Each element has its own unique symbol! Examples: Na, C, H, Li, N, O, Ar, Xe, Mg, K, Be, Sr, Cl One or two letter symbols are used to represent elements. First letter is always capitalized and the second letter is always a lower case. Take care to WRITE elemental symbols CORRECTLY! Co (cobalt, Z=27) vs. CO (carbon monoxide) Pure substances: Elements The smallest particle of an element is an ATOM!
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
3/24/11 No. 92 (U – Uranium ) is the largest naturally occurring element; elements 1-92 are naturally occurring –the others are not More on this in CH. 3 “Atoms and Elements”
Background image of page 10
3/24/11 You are responsible for learning the names and symbols for common elements, so it may be helpful for you to get started soon (note cards help). Names of Some Common Elements and Their Symbols
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 12
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 62

Chapter 2Energy and Matter - Ch. 2: Matter and Energy...

This preview shows document pages 1 - 12. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online