Consider the equilibrium system
Given
calculate S° for HF(aq).
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Chapter 21 Solutions
Chemistry: Principles and Reactions
- For each situation described in Question 13, predict whether the entropy of the system increases or decreases.arrow_forwardThe standard Gibbs free energy change at 100oC is 18.8 kJ/mol for the solubility equilibrium: Li3PO4(s) →← 3Li+(aq) + PO43–(aq); ∆Gorxn = 18.8 kJ/mol What is the molar solubility of lithium phosphate at this temperature? Enter your answer with correct units and significant figures.arrow_forwardAt -119 °C, Keq = 0.472 for the reaction: (a) What is the value of Keq for the reaction NOBr(g) NO(g) + 1/2 Br₂(g)? = 2.12 (b) What is the value of Keq for the reaction 2 NO(g) + Br₂(g) = 2 NOBr(g)? Keq=0.944 NO(g) + 1/2 Br₂(g) = NOBr(g) |x Keq=1.06 (c) What is the value of Keq for the reaction 2 NOBr(g) = 2 NO(g) + Br₂(g)? Xarrow_forward
- Calculate the equilibrium constant for the following reaction at 25o C, given that change in standard Gibbs free energy (f) of O3 (g) is 163.4 kJ/mol. 2O3(g) -> 3O2(g)arrow_forwardCalculate the ΔH for the reaction. Show the complete and step by step solution. NO(g) + O(g) -> NO2 (g) given the following information: NO(g) + O3(g) -> NO2(g) +O2(g) ΔH = -198.9kJ O3(g) -> 3/2 O2(g) ΔH=-142.3kJ O2(g) -> 2O (g) ΔH=495.0kJarrow_forwardWrite the equilibrium expression for the reaction: 2 HC1 (aq) + Ca(OH)2 (aq) = CaCl2 (aq) + 2H2O (1) ΔΗ- 174. 15 kJ -arrow_forward
- When the substances in the equation below are at equilibrium at pressure Pand temperature T, how can the equilibrium be shifted to favor the products?CuO(s) + H2(g) Cu(s) + H2O(g)Change in enthalpy = –2.0 kJ.arrow_forward이 O₂N Br NaOH, 80 °C then H3O+arrow_forward2 K(s) + 2 H2O(l) → 2 KOH(aq) + H2(g) AH-393 kJ/molræn When 3.9 g of K(s) is added to 200. mL of water at 25°C in a calorimeter, all the K(s) reacts with the water as represented by the equation above. Which of the following is true about the pH of the water after the reaction is complete? (A) pH 7 The pH of the water cannot be determined without additional information.arrow_forward
- Oxygen can be converted into ozone by the action of lightning or electric sparks: 302(g) 2 203(g) For this reaction, AH = +68 kcal/mol (+285 kJ/mol) 2.68 X 10-29 at 25 °C. and K (a) Is the reaction exothermic or endothermic? (b) Are the reactants or the products favored at equilibrium? (c) Explain the effect on the equilibrium of (1) increasing pressure by decreasing volume. (2) increasing the concentration of O2(g). (3) increasing the concentration of O3(g). (4) adding a catalyst. (5) increasing the temperature.arrow_forwardThe Δ?vapΔHvap of a certain compound is 19.52 kJ·mol−1 and its ΔSvap is 81.67 J·mol−1·K−1. What is the boiling point of this compound?arrow_forwardWrite the equilibrium-constant expression for the reaction, NH3(aq) + H2O(l) ∆ NH4+(aq) + OH-(aq)arrow_forward
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningChemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage Learning