CHAPTER+3 - 1 Chemical Reactions Law of Conservation of...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Chemical Reactions Law of Conservation of Mass ) Atoms neither created nor destroyed Stoichiometry ) Quantitative relationships between reactants and/or product of a reaction Chemical Equations ) Need a balanced equation for calculations 2 Chemical Equations Reactants on left; Products on right ) A + B C + D , A reacts with B to yield C and D Balance equations with coefficients ) 2H 2 + O 2 2H 2 O ) do not change subscripts to balance equations 3 Combustion of Methane
Background image of page 1

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

View Full DocumentRight Arrow Icon
4 Symbols of Physical States 2K(s) + 2H 2 O(l) 2KOH(aq) + H 2 (g) ) (s) solid ) (l) liquid ) (aq) aqueous solution ) (g) gas GAS GIVEN OFF AS PRODUCT SOLID FORMED AS PRODUCT HEAT REQUIRED FOR REACTION 5 Practice Balancing Equations Equation C 3 H 8 + O 2 CO 2 + H 2 O Step 1 C 3 H 8 + O 2 3CO 2 + 4H 2 O Step 2 C 3 H 8 + 5O 2 3CO 2 + 4H 2 O Step 3 may need to use fractional coefficient such as 5/2 Step 4 multiply equation by 2(or some other number) to make all coefficients whole numbers 6 Classification of Chemical Reactions Combustion Combination ) 2Mg + O 2 2MgO Decomposition ) CaCO 3 CaO + CO 2 Metathesis Oxidation-Reduction
Background image of page 2
7 Reactions with Oxygen Movie 8 Equations for Demonstration Mg + O 2 MgO 2Mg + O 2 2MgO Fe + O 2 Fe 2 O 3 4Fe + 3O 2 2Fe 2 O 3 P 4 + O 2 P 4 O 10 P 4 + 5O
Background image of page 3

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

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/15/2008 for the course CHEM 1341 taught by Professor Compton during the Spring '08 term at Texas State.

Page1 / 9

CHAPTER+3 - 1 Chemical Reactions Law of Conservation of...

This preview shows document pages 1 - 4. Sign up to view the full document.

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