CHEM 102 Lecture Notes - Lecture 19: Jmol, Joule, Sodium Hydroxide

• School: University of Illinois
• Department: Chemistry
• Course: CHEM 102
• Professor: Overcash John

Document Summary

Ch4 + 2o2 --> co2 + 2h2o h = -890 kj. When 1 mol ch4 is combusted, 890 kj of energy"s released. For every 2 moles of water produced, 890 kj of energy is released. C12h22o11 + 12 o2 --> 12 co2 + 11 h2o h=-5645 kj. How much energy (j) can we get by burning an equivalent of 10 gummy bears (2. 5 g/bear, Technique used to measure heat exchange during a reactoin (based on 1st lot) qrxn = -qcalorimeter q=c t q= heat c= heat capacity t= change in temp. Heat capacity (c) : heat required to raise t by 1 c. Specific heat capacity (cs): heat required to raise t of 1 g by 1 c. Molar heat capacity (cm): heat required to raise t of 1 mol by 1 c. Rxn gives off /takes in heat to the solution ear, assuming pure sucrose) ial t. Rxn gives off /takes in heat to the solution qrxn = -qsolution.