This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: Class 19 – Chemical Reactions & Catalysis Molecules of Life – Spring 2011 1 NATURAL SCIENCE II: MOLECULES OF LIFE Spring 2011 Class 19 – Wednesday, April 13 Chemical Reactions and Catalysis Reading: Chapter 18 Next class: Chapter 19, pp. 1 – 15 OUTLINE (1) Announcements & review (2 Who are better chemists humans or bacteria? 1 (2) Who are better chemists – humans or bacteria? (3) Getting a reaction started (4) A chemical reaction pathway (5) How do catalysts work? (6) The catalytic converter ANNOUNCEMENTS Class 19 – Chemical Reactions & Catalysis Molecules of Life – Spring 2011 2 WHO ARE BETTER CHEMISTS? – HUMANS OR BACTERIA Plants need a supply of nitrogen to grow. But they cannot directly utilize the nitrogen gas (N 2 ) in the air. To produce nitrogen fertilizers , it is necessary to “ fix ” the nitrogen in a form the plants can use. 3 FIXING NITROGEN BY THE HABER PROCESS Fritz Haber deduced the optimal conditions for reacting N 2 and H 2 to produce NH 3 (ammonia). (ammonia)....
View Full Document
- Spring '11
- Catalysis, Haber process, Chemical Reactions & Catalysis