SABIC CHEM 101 Chapter 3 - Part 3

SABIC CHEM 101 Chapter 3 - Part 3 - ChemicalEqua-ons A...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Chemical Equa-ons A chemical change involves a reorganization of the atoms in one or more substances. We express this chemical change by way of a Chemical Reaction . The chemical reaction shows the bonds have been made and broken. Example: Combustion of methane CH 4 + O 2 CO 2 + H 2 0 Reactants Products C-H and O-O bonds have been broken and C-O and O-H bonds have been formed The chemical reaction gives two important pieces of information: The nature of the reactants and products and the relative number of each. We must identify the physical state of the reactants and products in the reaction
Background image of page 1

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

View Full DocumentRight Arrow Icon
Physical States CH 4 (g) + O 2 (g) CO 2 (g) + H 2 0 (g) We designate the physical state of each reactant and product of the reaction by including the symbol after the reactant. For the combustion of methane, which happens at high temperature, all the reactants and products are gases, so:
Background image of page 2
Chemical Equa-ons A chemical change involves a reorganization of the atoms in one or more substances. We express this chemical change by way of a Chemical Reaction . The chemical reaction shows the bonds have been made and broken. Example: Combustion of methane Reactants Products C-H and O-O bonds have been broken and C-O and O-H bonds have been formed Recall: Atoms are neither created nor destroyed in a chemical reaction, only rearranged. Therefore, all atoms present in the reactants must be accounted for in the products – There must be the same number of each atom on either side of the reaction arrow We must balance our chemical equations CH 4 (g) + O 2 (g) CO 2 (g) + H 2 0 (g)
Background image of page 3

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

View Full DocumentRight Arrow Icon
Balancing Chemical Equa-ons Example: Combustion of methane Reactants Products This equation is not balanced: The number of H and O atoms are not equivalent on the two sides. Changing the coefficients in an equation allows for CH 4 (g) + O 2 (g) CO 2 (g) + H 2 0 (g) CH 4 (g) + 2O 2 (g) CO 2 (g) + 2H 2 0 (g) This is our balanced chemical equation
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/13/2011 for the course CHEM 101 taught by Professor Fitts during the Fall '08 term at UPenn.

Page1 / 31

SABIC CHEM 101 Chapter 3 - Part 3 - ChemicalEqua-ons A...

This preview shows document pages 1 - 5. Sign up to view the full document.

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