A scientist measures the standard enthalpy change for the following reaction to be -876.5 kJ: 2NH3(g) + 3 N₂O(g) 4N₂(g) + 3 H₂O(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of NH3(g) is Submit Answer Use the References to access important values if needed for this question. 1 question attempt remaining kJ/mol.

A scientist measures the standard enthalpy change for the following reaction to be -876.5 kJ: 2NH3(g) + 3 N₂O(g) 4N₂(g) + 3 H₂O(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of NH3(g) is Submit Answer Use the References to access important values if needed for this question. 1 question attempt remaining kJ/mol.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Using the standard enthalpies of formation, calculate the standard enthalpy change for the overall reaction that occurs when ammonia is burned in air to form nitrogen dioxide and water. 4NH,(g) +70,,g) 4NO,(g) 6H.O(1) AH of NH₂(g) = -46 kJ/mol AH of NO(g) = 34 kJ/mol, AH of H₂O() = -286 kJ mol f f 5 O-360 kJ -1396 kJ O-1496 kJ O -1496 kJ Question 9 - 1 Not yet answered - Flag question
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Use the References to access important values if needed for this question. A scientist measures the standard enthalpy change for the following reaction to be 31.1 kJ: CO2(g) + H2(g)–→CO(g)+ H2O(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of H20(g) is kJ/mol. Submit Answer Try Another Version 3 item attempts remaining
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I Review | Constants | Periodic Table Learning Goal: To understand how standard enthalpy of reaction is related to the standard heats of formation of the reactants and products. In a generic chemical reaction involving reactants A and B and products C and D, aA + 6B→¢C+dD, the standard enthalpy AHm of the reaction is given by The standard enthalpy of reaction is the enthalpy change that occurs in a reaction when all the reactants and products are in their standard states. The symbol for the standard enthalpy of reaction is AHm, where the subscript "rxn" stands for "reaction." The standard enthalpy of a reaction is calculated from the standard heats of formation (AH?) ΔΗΡcΔΗ (C) + dΔΗ; (D) -αΔΗ (Α) - bΔΗ; (Β) Notice that the stoichiometric coefficients, a, b, c, d, are an important part of this equation. This formula is often generalized as follows, where the first sum on the right- hand side of the equation is a sum over the products and the second sum is over the reactants:…