Lecture 12 Redox reactions; Titrations

Lecture 12 Redox reactions; Titrations - Lec-12:...

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Unformatted text preview: Lec-12: Energy/Thermochemistry Roy A. Lacey, Stony Brook University; Che 131, Spring 2011 1 Fuels/Energy U.S. uses ~ 1.0 x 10 6 kJ of fuel per day. Most from petroleum and natural gas. Remainder from coal nuclear Remainder from coal, nuclear, and hydroelectric. Fossil fuels are not renewable Fossil fuels are not renewable . Roy A. Lacey, Stony Brook University; Che 131, Spring 2011 2 Fuels/Energy Fusion Reactions in the sun provide the energy required to sustain life on Earth Roy A. Lacey, Stony Brook University; Che 131, Spring 2011 3 to sustain life on Earth Fuels/Energy Harnessing other sources of energy Roy A. Lacey, Stony Brook University; Che 131, Spring 2011 4 Fuels/Energy Fuel value = energy released when 1 g of Fuel value = energy released when 1 g of Fuel value energy released when 1 g of Fuel value energy released when 1 g of substance is burned. substance is burned. Hydrogen has great potential as a fuel with a fuel value Roy A. Lacey, Stony Brook University; Che 131, Spring 2011 5 of 142 kJ/g. Energy/food Energy in our bodies comes from carbohydrates and fats (mostly). Intestines: carbohydrates converted into glucose: C 6 H 12 O 6 + 6O 2 6CO 2 + 6H 2 O, H = - 2816 kJ Fats break down as follows: 2C 57 H 110 O 6 + 163O 2 114CO 2 + 110H 2 O, H =- 75,520 kJ H 75,520 kJ Fats: contain more energy; are not water soluble so are good for energy storage Roy A. Lacey, Stony Brook University; Che 131, Spring 2011 6 soluble, so are good for energy storage. Energy ` Energy is consumed and produced by chemical reactions chemical reactions.chemical reactions....
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This note was uploaded on 06/04/2011 for the course CHE 131 taught by Professor Kerber during the Spring '08 term at SUNY Stony Brook.

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Lecture 12 Redox reactions; Titrations - Lec-12:...

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