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Thermochemistry

Chemistry 101 exam 2 key

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Butane
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Carbon monoxide

Chemistry 101 - Exam II Name ______________________ 26 October 2016 Show all work for credit. State any assumptions made to solve a problem. Give all numerical answers with the correct number of significant figures. All answers in scientific notation must be in correct scientific notation (i.e., 6.022?1023 not 6.022E23 or 6.022e23). All instances of incorrect scientific notation will result in the loss of 3 points each. All numbers that require units should have the units written. All instances of numbers without units will result in the loss of 3 points each. 1. (26 points) Cetane, C16H34, is a typical petrodiesel with a standard enthalpy of combustion of ?10 699.1 kJ mol?1. Methyl linoleate, C19H34O2, is a biodiesel with a standard enthalpy of

5.1: Energy and World of Life Notes

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Forms of energy

Kavya Immanni Mrs.Rothfuss Honors Biology I / 3B 2, February 2017 5:1 Energy and the World of Life Notes I. Energy Disperses A. First law of thermodynamics:? Energy cannot be created or destroyed B. Energy can be converted into different forms C. Potential energy:? capacity to cause change because of where an object is located or how parts are arranged 1. Example: ATP has P.E. because of the chemical bonds that hold its atoms in certain arrangements. In muscle cells, the chemical energy of ATP is transferred to myosin. ATP is converted to kinetic energy D. Kinetic Energy: ?energy of motion E. Energy tends to disperse spontaneously, each form of energy disperses until no part of a system holds more energy than it

Enthalpy of formations chart for common substances

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enthalpy of formation

Table of Heats of Formation Compound ?Hf (kJ/mol) Compound ?Hf (kJ/mol) AgBr(s) -99.5 C2H2(g) +226.7 AgCl(s) -127.0 C2H4(g) +52.3 AgI(s) -62.4 C2H6(g) -84.7 Ag2O(s) -30.6 C3H8(g) -103.8 Ag2S(s) -31.8 n-C4H10(g) -124.7 Al2O3(s) -1669.8 n-C5H12(l) -173.1 BaCl2(s) -860.1 C2H5OH(l) -277.6 BaCO3(s) -1218.8 CoO(s) -239.3 BaO(s) -558.1 Cr2O3(s) -1128.4 BaSO4(s) -1465.2 CuO(s) -155.2 CaCl2(s) -795.0 Cu2O(s) -166.7 CaCO3 -1207.0 CuS(s) -48.5 CaO(s) -635.5 CuSO4(s) -769.9 Ca(OH)2(s) -986.6 Fe2O3(s) -822.2 CaSO4(s) -1432.7 Fe3O4(s) -1120.9 CCl4(l) -139.5 HBr(g) -36.2 CH4(g) -74.8 HCl(g) -92.3 CHCl3(l) -131.8 HF(g) -268.6

harvesting energy from food

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Harvesting Energy from Food Cellular respiration involves catabolic pathways. Substances are being broken down. Pathways are exergonic. Couple an endergonic reaction with an exergonic reaction ADP + PI ? ATP 2 catabolic pathways covered that are exergonic and release energy to power endergonic reaction Cellular respiration begins with glucose. Aeorbic Fermentation begins with glucose. Anaerobic
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Reactions and Enzymes

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Endergonic and exergonic | Back to Top Energy releasing processes, ones that "generate" energy, are termed exergonic reactions. Reactions that require energy to initiate the reaction are known as endergonic reactions. All natural processes tend to proceed in such a direction that the disorder or randomness of the universe increases (the second law of thermodynamics). Time-energy graphs of an exergonic reaction (top) and endergonic reaction (bottom). Images from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates (www.sinauer.com) and WH Freeman (www.whfreeman.com), used with permission. Oxidation/Reduction | Back to Top
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