Maximum work that can be obtained = 343 kJ
M12. Methanol, CH3OH, has been considered as a possible fuel. Consider its oxidation: 2 CH3OH(1) +...
From the following heats of combustion, CH3OH(l) + 3/2O2(g) → CO2(g) + 2H2O(l) ΔHorxn = –726.4 kJ/mol C(graphite) + O2(g) → CO2(g) ΔHorxn = –393.5 kJ/mol H2(g) + ½O2(g) → H2O(l) ΔHorxn = –285.8 kJ/mol Calculate the enthalpy of formation of methanol (CH3OH) from its elements. C(graphite) + 2H2(g) + ½O2(g) → CH3OH(l) Methanol (CH3OH) is an organic solvent and is also used as a fuel in some automobile engines. From...
Methanol, CH3OH (l), combusts according to the following equation: 2 CH3OH (l) + 3 O2 (g) → 2 CO2 (g) + 4 H2O (l) ∆rHo (298 K) = −1452 kJ Here is a list of Entropies of formation: S (J K-1 mol-1) at 298 K CH3OH (l) =126.8 O2 (g) = 205.14 CO2 (g) = 213.74 H2O = (l) 69.91 (a) If the above reaction was used in a fuel cell, say, to perform work, what will be the maximum...
1) Consider the equilibrium of methanol vapor and the liquid. CH3OH(l)↽−−⇀CH3OH(g) Thermodynamic Table at 25 ∘C Substance ΔHf∘ (kJ/mol) S∘ (J/mol‑K) ΔGf∘ (kJ/mol) CH3OH(l) −239.2 126.8 −166.6 CH3OH(g) −201.0 239.9 −162.3 What is the vapor pressure of the methanol at −30 ∘C? Pvap= atm What is the vapor pressure of the methanol at 40 ∘C? Pvap= 2) Substance ΔG°f(kJ/mol) M2O(s) −8.70 M(s) 0 O2(g) 0 Consider the decomposition of a metal oxide to its elements, where M represents a generic...
9. Certain race cars use methanol (CH3OH; also called wood alcohol) as a fuel. Methanol has a molecular mass of 32.0 g/mol and a density of 0.79 g/mL. The combustion of methanol occurs according to the following equation: 2CH3OH + 3O2 ? 2CO2 + 4H2O In a particular reaction 2.00 L of methanol are reacted with 80.0 kg of oxygen. a. What is the limiting reactant? b. What reactant and how many grams of it are left over? c. How...
Methanol (CH3OH) is used as a fuel in race cars. Part A Write a balanced equation for the combustion of liquid methanol in air, assuming H2O(g) as a product. Express your answer as a chemical equation. Identify all of the phases in your answer. SubmitPrevious AnswersRequest Answer Incorrect; Try Again; 5 attempts remaining Part B Calculate the standard enthalpy change for the combustion of 1 mol of liquid methanol, assuming H2O(g) as a product. Express your answer using four significant...
10. Given the themochemical equation for the combustion of methanol. 2 CH3OH(g) + 3 O2(g) ® 2 CO2(g) + 4 H2O(l) DrH = −1453 kJ/mol reaction d. Review the units “kJ/mol reaction”. What does “mole reaction” mean? e. If you produce 857 kJ of heat, how many “mole reactions” occurred? f. Relate the energy of the “mole reaction” to moles of methanol and determine the mass (in grams) of methanol needed.
(2) (24 pts) A fuel cell produces electricity via a combustion reaction. A DMFC is a proton-exchange fuel cell that uses methanol CH3OH) as the fuel, which reacts with molecular oxygen to produce carbon dioxide and water. (a) (4 pts) Write the balanced combustion reaction for this methanol fuel cell. (b) (4 pts) Write the balanced half-reactions occurring at the cathode and anode of this fuel cell (assume standard acidic conditions) (e) (4 pts) Evaluate AGº (kJ) and AE° (V)...
1. 1) luciferin+O2 ⇌ oxyluciferin+light 2) ATP⇌AMP+PPi ΔG∘=−31.6 kJ/mol If the overall ΔG∘ of the coupled reaction is -1.21 kJ/mol , what is the equilibrium constant, K, of the first reaction at 11∘C? Round your answer to 3 significant figures. 2. When methanol (CH3OH) is combusted, such as when in a gasoline blend, the following reaction occurs: 2CH3OH(l)+3O2(g)→2CO2(g)+4H2O(g) Based on the standard free energies of formation given, what is the standard free energy change for this reaction? Report the answer...
(2) (24 pts) A fuel cell produces electricity via a combustion reaction. A DMFC is a proton-exchange fuel cell that uses methanol CH OH() as the fuel, which reacts with molecular oxygen to produce carbon dioxide and water. (a) (4 pts) Write the balanced combustion reaction for this methanol fuel cell (b) (4 pts) Write the balanced half-reactions occurring at the cathode and anode of this fuel cell (assume standard acidic conditions). (c) (4 pts) Evaluate AG° (kJ) and AE...
The compound 1-pentanol, C5H12O, is a good fuel. It is a liquid at ordinary temperatures. When the liquid is burned, the reaction involved is 2 C5H12O(ℓ) + 15 O2(g)10 CO2(g) + 12 H2O(g) The standard enthalpy of formation of liquid 1-pentanol at 25 °C is -351.6 kJ mol-1; other relevant enthalpy of formation values in kJ mol-1 are: C5H12O(g) = -294.6 ; CO2(g) = -393.5 ; H2O(g) = -241.8 (a) Calculate the enthalpy change in the burning of 5.000 mol...