F07C107 10OrgMol1

Slide1: 

Question of the day … What is the structural formula of butane (C4H10)? (“Butane gas”)

Today:: 

Today: Chemical reactions Structures of organic molecules Hydrocarbons

Chemical Reactions in General:: 

Chemical Reactions in General: Bonds between atoms are broken and new combinations of atoms are bonded together Energy is required. At higher temperatures chemical reactions proceed faster. Meaning of “Endothermic” or “exothermic” reaction? Signs that a chemical reaction probably has occurred? …. EXPERIMENT!

Chemical Reactions in Plants Time and highly specialized catalysts ….: 

Chemical Reactions in Plants Time and highly specialized catalysts ….

Photosynthesis: 

Photosynthesis A very general equation ! Glucose required for the biosynthesis of cellulose, plant pigments, fragrances, plant toxins …..

Slide6: 

Organic compounds (in Plants) Review/preview your reader for good understanding

Slide7: 

Practice: Organic compound or not ? H2O b) C6H12O6 c) C12 H22O11 d) CH4 e) CO2 f) C (carbon) g) CaCO3?

Slide8: 

Structures of Organic Molecules Organic molecules are made up of only a few elements: C (4 bonds) H (1 bond) O (2 bond) N (3 bonds)

Hydrocarbons (have C, H only): 

Hydrocarbons (have C, H only) Introduction to organic molecules C H H H H CH4 methane Natural gas Cooking gas In swamps …

Hydrocarbons: 

Hydrocarbons CH4 methane C2H6 ethane C3H8 propane C4H10 butane C7H16 heptane C8H18 octane C10H22 decane Gases at RT! Liquids at RT! More than about 16 C’s: Solid at RT C H H H H

Slide11: 

Draw isomers for C5H12 (“pentane”) Isomers: Same molecular formula, different structures

Slide12: 

Gas chromatogram of a petroleum sample

Slide13: 

Resin of Jeffrey Pines contains Heptane C7H16

Slide14: 

Fragrance of Magnolias contains Decane C10H22

Ethylene (“Ethene”), a ripening hormone: 

Ethylene (“Ethene”), a ripening hormone

Example: Combustion of C6H14 (hexane; found in gasoline) C6H14 + O2 CO2 + H2O + E!Balanced equation: 2 C6H14 + 19 O2 12 CO2 + 14 H2O : 

Example: Combustion of C6H14 (hexane; found in gasoline) C6H14 + O2 CO2 + H2O + E! Balanced equation: 2 C6H14 + 19 O2 12 CO2 + 14 H2O Combustion “Burning” Complete combustion of an organic compound, i.e. with plenty of oxygen, always forms the products CO2 and H2O

Slide17: 

A picture to think about ….

Next time:: 

Next time: Getting energy Glucose and other organic molecules