CHEM 1122 Lecture Notes - Lecture 6: Orange Oil, Vinaigrette, Heat Capacity
Document Summary
Physical property identify by senses, but no change to composition. 1: burning gasoline: chemical, scent of orange oil: physical, color change of lacquer: chemical. In a chemical reaction, matter is only transformed, but not destroyed. Types of energy: potential: energy that can be converted to work, kinetic: energy of motion, electrical: energy associated with electron movement, thermal: energy of heat, chemical: form of potential energy associated with molecular shape of atoms in molecules. 1800 cal * 1000 cal/1 cal * 4. 184 j/1 cal = 7. 531 x 10^7 j. H2o(l) (water) + heat h2o(g) (steam) (endo) H2o (l) h2o (s) (ice) + heat (exo) Fahrenheit (degrees f); c = (f - 32)/1. 8. Celsius (degrees c); k = c + 273. 15. 777 233 *c (451-32)/1. 8: k=c + 273. 15, 233 + 273. 15, answer: 506. 15 506 k. How much heat can be held by a substance. The amount of energy needed to raise temperature by 1 degree c.
