Part B: Thermochemical Stoichiometry Tip for handling stoichiometry problems involving thermochemistry: If AH values are provided next to a written chemical equation, then that change in enthalpy applies to the chemical equation as written, with coefficients representing numbers of moles of each substance. Otherwise, enthalpy terms are essentially like reactants (if AH is positive) or products (if AH is negative), and you can construct conversion factors involving mole ratios and enthalpy terms in a way that's similar to plain old mole ratios in standard stoichiometry problems. 1. Nitrogen monoxide reacts with oxygen gas to give the brownish gas nitrogen dioxide: 2NO + Ozle) → 2NO216) AHn = -114.1 kJ Is the reaction endothermic or exothermic? A. If 1.25 g of NO is converted completely to NO2, what quantity of heat is absorbed or evolved? Remember to include the proper sign for your answer! В. C. What volume of NO gas at 2.35 atm and 300. K is required to produce 435 kJ of heat from the reaction described above? Universal gas constant R = 0.0820578 (L atm) / (mol K)

Part B: Thermochemical Stoichiometry Tip for handling stoichiometry problems involving thermochemistry: If AH values are provided next to a written chemical equation, then that change in enthalpy applies to the chemical equation as written, with coefficients representing numbers of moles of each substance. Otherwise, enthalpy terms are essentially like reactants (if AH is positive) or products (if AH is negative), and you can construct conversion factors involving mole ratios and enthalpy terms in a way that's similar to plain old mole ratios in standard stoichiometry problems. 1. Nitrogen monoxide reacts with oxygen gas to give the brownish gas nitrogen dioxide: 2NO + Ozle) → 2NO216) AHn = -114.1 kJ Is the reaction endothermic or exothermic? A. If 1.25 g of NO is converted completely to NO2, what quantity of heat is absorbed or evolved? Remember to include the proper sign for your answer! В. C. What volume of NO gas at 2.35 atm and 300. K is required to produce 435 kJ of heat from the reaction described above? Universal gas constant R = 0.0820578 (L atm) / (mol K)

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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