2. Please calculate the standard enthalpy of reaction (AHxn, in kJ/mol) for the preparation of nitrous acid, HNO2, using the thermodynamic data given below. Preparation of nitrous acid: HCl(g) + NaNO2(s)→ HNO2(1) + NaCl(s) 2NaCl(s) + H₂O(l) → 2HCl(g) + Na₂O(s) NO(g) + NO₂(g) + Na₂O(s) → 2NaNO₂(s) NO(g) + NO2(g) → N₂O(g) + O₂(g) 2HNO2(1)→ N₂O(g) + O₂(g) + H₂O(g) H₂O(1)→ H₂O(g) ΔΗ 507.31 kJ/mol AH-427.14 kJ/mol AH = -42.68 kJ/mol ΔΗ = 34.35 kJ/mol ΔΗ 44.012 kJ/mol
2. Please calculate the standard enthalpy of reaction (AHxn, in kJ/mol) for the preparation of nitrous acid, HNO2, using the thermodynamic data given below. Preparation of nitrous acid: HCl(g) + NaNO2(s)→ HNO2(1) + NaCl(s) 2NaCl(s) + H₂O(l) → 2HCl(g) + Na₂O(s) NO(g) + NO₂(g) + Na₂O(s) → 2NaNO₂(s) NO(g) + NO2(g) → N₂O(g) + O₂(g) 2HNO2(1)→ N₂O(g) + O₂(g) + H₂O(g) H₂O(1)→ H₂O(g) ΔΗ 507.31 kJ/mol AH-427.14 kJ/mol AH = -42.68 kJ/mol ΔΗ = 34.35 kJ/mol ΔΗ 44.012 kJ/mol
Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter5: Principles Of Chemical Reactivity: Energy And Chemical Reactions
Section5.8: Product- Or Reactant-favored Reactions And Thermodynamics
Problem 1.1ACP: The standard enthalpies of formation of KNO3(s) and K2S(s) are 494.6 kJ/mol and 376.6 kJ/mol,...
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Transcribed Image Text:2. Please calculate the standard enthalpy of reaction (AHrxn, in kJ/mol) for the preparation of
nitrous acid, HNO2, using the thermodynamic data given below.
Preparation of nitrous acid: HCl(g) + NaNO2(s) → HNO2(1) + NaCl(s)
2NaCl(s) + H₂O(l) → 2HCl(g) + Na₂O(s)
NO(g) + NO₂(g) + Na2O(s) → 2NaNO2 (s)
NO(g) + NO₂(g) → N₂O(g) + O₂(g)
2HNO2(1)→ N₂O(g) + O2(g) + H₂O(g)
H₂O(1)→ H₂O(g)
ΔΗ =
507.31 kJ/mol
AH = -427.14 kJ/mol
AH = - 42.68 kJ/mol
34.35 kJ/mol
ΔΗ
ΔΗ = 44.012 kJ/mol
=
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