Chemical energy is released or absorbed from reactions in various forms. The most easily measurable form...
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Chemical energy is released or absorbed from reactions in various forms. The most easily measurable form of energy comes in the form of heat, or enthalpy. The enthalpy of a reaction can be calculated from the heats of formation of the substances involved in the reaction: ΔΗån = ΣηΔΗ (products) - Ση.ΔΗ (reactants) where n represents the stoichiometric coefficients. ♥ Part A Calculate the standard enthalpy change for the reaction Use the following data: ΔΗ Substance (kJ/mol) A B C D Express your answer to three significant figures and include the appropriate units. ► View Available Hint(s) AH 309 kJ Submit -263 -383 183 -483 ✓ Correct Part B Previous Answers 2A+B=2C+2D For the reaction given in Part A, how much heat is absorbed when 3.60 mol of A reacts? Express your answer to three significant figures and include the appropriate units. ▸ View Available Hint(s) Chemical energy is released or absorbed from reactions in various forms. The most easily measurable form of energy comes in the form of heat, or enthalpy. The enthalpy of a reaction can be calculated from the heats of formation of the substances involved in the reaction: ΔΗån = ΣηΔΗ (products) - Ση.ΔΗ (reactants) where n represents the stoichiometric coefficients. ♥ Part A Calculate the standard enthalpy change for the reaction Use the following data: ΔΗ Substance (kJ/mol) A B C D Express your answer to three significant figures and include the appropriate units. ► View Available Hint(s) AH 309 kJ Submit -263 -383 183 -483 ✓ Correct Part B Previous Answers 2A+B=2C+2D For the reaction given in Part A, how much heat is absorbed when 3.60 mol of A reacts? Express your answer to three significant figures and include the appropriate units. ▸ View Available Hint(s)
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Principles of Information Systems
ISBN: 978-0324665284
9th edition
Authors: Ralph M. Stair, George W. Reynolds
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