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13 Dec 2019

Methanol burns in oxygen to form carbon dioxide and water.

Part A Write a balanced equation for the combustion of methanol. 2CH3OH(l)+3O2(g)→2CO2(g)+4H2O(g)

Part B Calculate ΔH∘rxn at 25 C.

Part C Calculate ΔS∘rxn at 25 C.

Part D Calculate ΔG∘rxn at 25 ∘C.

Part E Is the combustion of methanol spontaneous?

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Related questions

59. Methanol (CH3OH) burns in oxygen to form carbon dioxide and water. Write a balanced equation for the combustion of liq- uid methanol and calculate AHIX, A Sex, and A Gixnat 25 °C. Is the combustion of methanol spontaneous?

Given the values of ΔH∘rxn, ΔS∘rxn, and T below, determine ΔSuniv.

Part A

ΔH∘rxn= 115 kJ , ΔS∘rxn=− 263 J/K , T= 301 K .
ΔSuniv= J/K

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Part B

ΔH∘rxn=− 115 kJ , ΔS∘rxn= 263 J/K , T= 301 K .
ΔSuniv= J/K

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Part C

ΔH∘rxn=− 115 kJ , ΔS∘rxn=− 263 J/K , T= 301 K .
ΔSuniv= J/K

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Part D

ΔH∘rxn=− 115 kJ , ΔS∘rxn=− 263 J/K , T= 557 K .

Express your answer using two significant figures.
ΔSuniv= J/K

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Part E

Predict whether or not the reaction in part A will be spontaneous. (Assume that all reactants and products are in their standard states.)

Predict whether or not the reaction in part A will be spontaneous. (Assume that all reactants and products are in their standard states.)
spontaneous
nonspontaneous

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Part F

Predict whether or not the reaction in part B will be spontaneous. (Assume that all reactants and products are in their standard states.)

Predict whether or not the reaction in part B will be spontaneous. (Assume that all reactants and products are in their standard states.)
spontaneous
nonspontaneous

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Part G

Predict whether or not the reaction in part C will be spontaneous. (Assume that all reactants and products are in their standard states.)

Predict whether or not the reaction in part C will be spontaneous. (Assume that all reactants and products are in their standard states.)
spontaneous
nonspontaneous

SubmitMy AnswersGive Up

Part H

Predict whether or not the reaction in part D will be spontaneous. (Assume that all reactants and products are in their standard states.)

Predict whether or not the reaction in part D will be spontaneous. (Assume that all reactants and products are in their standard states.)
spontaneous
nonspontaneous

Exercise 18.65

Use tabulated half-cell potentials to calculate ΔG∘rxn for each of the following reactions at 25 ∘C.

Part A

Pb2+(aq)+Mg(s)→Pb(s)+Mg2+(aq)
ΔG∘rxn = kJ

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Part B

Br2(l)+2Cl−(aq)→2Br−(aq)+Cl2(g)

Express your answer using two significant figures.
ΔG∘rxn = kJ

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Part C

MnO2(s)+4H+(aq)+Cu(s)→Mn2+(aq)+2H2O(l)+Cu2+(aq)

Express your answer using two significant figures.
ΔG∘rxn = kJ

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