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Calculate the enthalpy of the reaction2NO(g)+O2(g)→2NO2(g)given the following reactions and enthalpies of formation:12N2(g)+O2(g)→NO2(g),   ΔH∘A=33.2 kJ12N2(g)+12O2(g)→NO(g),  ΔH∘B=90.2 kJCalculate the enthalpy of the reaction4B(s)+3O2(g)→2B2O3(s)given the following pertinent information:B2O3(s)+3H2O(g)→3O2(g)+B2H6(g),    ΔH∘A=+2035 kJ2B(s)+3H2(g)→B2H6(g),                             ΔH∘B=+36 kJH2(g)+12O2(g)→H2O(l),                             ΔH∘C=−285 kJH2O(l)→H2O(g),                                           ΔH∘D=+44 kJ

Question

Calculate the enthalpy of the reaction

2NO(g)+O2(g)→2NO2(g)

given the following reactions and enthalpies of formation:

  1. 12N2(g)+O2(g)→NO2(g),   ΔH∘A=33.2 kJ
  2. 12N2(g)+12O2(g)→NO(g),  ΔH∘B=90.2 kJ

Calculate the enthalpy of the reaction

4B(s)+3O2(g)→2B2O3(s)

given the following pertinent information:

  1. B2O3(s)+3H2O(g)→3O2(g)+B2H6(g),    ΔH∘A=+2035 kJ
  2. 2B(s)+3H2(g)→B2H6(g),                             ΔH∘B=+36 kJ
  3. H2(g)+12O2(g)→H2O(l),                             ΔH∘C=−285 kJ
  4. H2O(l)→H2O(g),                                           ΔH∘D=+44 kJ
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Step 1

Hi there! Since there are multiple questions, we will answer the first question for you. If you need help with the other question, kindly post it separately.

Step 2

It is required to calculate the enthalpy of the reaction which is,

2NO (g)O2 g)-2 NO2 (g)
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2NO (g)O2 g)-2 NO2 (g)

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Step 3

The given reacti...

½ N2 (g)+ O2 (g)-NO2 (g),
AHA = 33.2 kJ
.. (1)
½ N2 (g)+2O2 (g)-»NO (g), AHOB = 90.2 kJ
(2)
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Image Transcriptionclose

½ N2 (g)+ O2 (g)-NO2 (g), AHA = 33.2 kJ .. (1) ½ N2 (g)+2O2 (g)-»NO (g), AHOB = 90.2 kJ (2)

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