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Calculate the standard enthalpy change for the fusion reaction of 1 mole of ice at 0°C to 1 mole of liquid water at 0°C. Given the standard enthalpy of fusion of water is 6.02 kJ/mol and the specific heat capacity of water is 4.18 J/(g·°C).

asked Feb 3 in Chemical thermodynamics by IvyHaddock2 (410 points)

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Calculate the standard enthalpy change for the reaction below, given the standard enthalpy of formation values: 2CO(g) + O2(g) → 2CO2(g)ΔH°f (CO) = -110.5 kJ/molΔH°f (O2) = 0 kJ/molΔH°f (CO2) = -393.5 kJ/mol

asked Feb 3 in Chemical thermodynamics by JuanHayman80 (590 points)

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Calculate the standard enthalpy change for the combustion of ethane (C2H6) gas to form carbon dioxide (CO2) gas and water (H2O) vapor at 298 K and 1 atm. The balanced chemical equation for the reaction is: C2H6(g) + 3.5 O2(g) → 2 CO2(g) + 3H2O(g) Given that the standard enthalpy of formation for C2H6(g) is -84.68 kJ/mol, CO2(g) is -393.51 kJ/mol, and H2O(g) is -241.82 kJ/mol.

asked Feb 3 in Chemical thermodynamics by NataliaCaben (670 points)

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Calculate the standard enthalpy change (ΔH°) for the reaction where 50.0 mL of 2.0 M hydrochloric acid reacts with 50.0 mL of 2.0 M sodium hydroxide to form 50.0 mL of 2.0 M sodium chloride and water, given that the density of the solutions is 1.00 g/mL and the specific heat capacity of the solutions is 4.18 J/g·°C.

asked Feb 3 in Chemical thermodynamics by JasmineDix47 (290 points)

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Calculate the standard enthalpy change (ΔH°) for the reaction of combustion of 1 mole of ethanol (C2H5OH) given that the standard enthalpy of formation (ΔH°f) for ethanol and carbon dioxide (CO2) are -277.7 kJ/mol and -393.5 kJ/mol respectively, and the standard enthalpy of formation (ΔH°f) for water (H2O) is -285.8 kJ/mol. The balanced chemical equation for the reaction is as follows:C2H5OH (l) + 3 O2 (g) → 2 CO2 (g) + 3 H2O (l)

asked Feb 3 in Chemical thermodynamics by GilbertoVall (450 points)

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Can SERS be used as a reliable technique to detect trace amounts of pesticides on food products?

asked Feb 3 in Surface Chemistry by KayleighGray (590 points)

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Calculate the standard enthalpy change for the formation of ammonia gas from nitrogen gas and hydrogen gas using Hess's Law, given the following equations and their corresponding enthalpy changes:N2(g) + 3H2(g) → 2NH3(g) ∆H = -92.4 kJ/molN2(g) → 2N(g) ∆H = 941 kJ/molH2(g) → 2H(g) ∆H = 436 kJ/mol

asked Feb 3 in ThermoChemistry by HesterKitamu (290 points)

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Calculate the polarization of a cell having an anode made of copper metal immersed in a 1.0 M Cu(NO3)2 solution and a cathode made of silver metal in a 1.0 M AgNO3 solution. Given that the potential of the copper electrode is -0.34 V and that of the silver electrode is 0.80 V. Also, assume that the current density is 0.1 A/cm² and that the temperature is 298 K.

asked Feb 3 in ElectroChemistry by DomingoMarce (410 points)

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Calculate the standard free energy change (ΔG°) for the following redox reaction: Zn (s) + 2H+ (aq) → Zn2+ (aq) + H2 (g)Given: ΔG°f (Zn2+) = -153.9 kJ/mol ΔG°f (H+) = 0 kJ/mol ΔG°f (H2) = 0 kJ/mol ΔG°f (Zn) = 0 kJ/mol

asked Feb 3 in Chemical thermodynamics by CherylYoul4 (350 points)

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Calculate the standard free energy change (ΔG°) for the following redox reaction at 298K:Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s) (Given: E°cell = 1.10V, F = 96,500 J/V.mol)

asked Feb 3 in Chemical thermodynamics by GlennaPark6 (550 points)

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Calculate the yield of ibuprofen obtained from the given starting materials (2-methylpropylbenzene and carbon dioxide) during the synthesis process.

asked Feb 3 in Chemical synthesis by HalLeMessuri (310 points)

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Calculate the standard enthalpy change for the following reaction: [Fe(H2O)6]2+(aq) + SO4 2-(aq) → [Fe(H2O)5 SO4]-(aq) + H2O(l) given that the standard enthalpies of formation of [Fe(H2O)6]2+, [Fe(H2O)5SO4]-, and H2O are -360 kJ/mol, -950 kJ/mol, and -286 kJ/mol, respectively.

asked Feb 3 in Chemical thermodynamics by NormanMoowat (250 points)

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Calculate the standard free energy change (∆G°) for the following redox reaction at 25°C:2 Fe³⁺(aq) + 3 H₂(g) → 2 Fe(s) + 6 H⁺(aq)

asked Feb 3 in Chemical thermodynamics by JaquelineQue (350 points)

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Design a chemical engineering system that can produce 500 kg of vanilla flavoring per day, using natural ingredients only. What raw materials will be needed? What is the production process involved? What safety measures should be implemented? How can sustainability be ensured in this process? Provide a detailed report on the system designed.

asked Feb 3 in Chemical engineering by AWQFrancis20 (710 points)

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Calculate the standard entropy change for the reaction of 2 moles of nitrogen gas reacting with 5 moles of oxygen gas to produce 2 moles of nitrogen monoxide gas at a constant pressure of 1 bar and 298 K. Given the standard molar entropy of nitrogen gas, oxygen gas, and nitrogen monoxide gas to be 191.6 J K-1 mol-1, 205.0 J K-1 mol-1, and 210.6 J K-1 mol-1, respectively.

asked Feb 3 in Chemical thermodynamics by AprilCutlack (630 points)

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Consider the coordination chemistry of metalloproteins and metalloenzymes. How does the binding of a metal ion to a protein or enzyme affect its structure and function? Provide specific examples of metalloproteins and metalloenzymes and describe the specific roles that the bound metal ions play in their function.

asked Feb 3 in Coordination Chemistry by CharlineBayn (430 points)

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Calculate the total resistance of an electrochemical cell consisting of two half-cells where one half-cell has a copper electrode submerged in a 0.5 M CuSO4 solution, and the other half-cell has a zinc electrode submerged in a 1.0 M ZnSO4 solution. The copper electrode is connected to the zinc electrode through a salt bridge. The resistance of the salt bridge is 22 ohms, and the resistance of the copper and zinc electrodes are negligible.

asked Feb 3 in ElectroChemistry by JacquieGartn (410 points)

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Calculate the standard enthalpy change for the neutralization reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH) using the following information:- The standard enthalpy of formation for HCl is -92.31 kJ/mol - The standard enthalpy of formation for NaOH is -469.11 kJ/mol The balanced equation for the reaction is:HCl (aq) + NaOH (aq) → NaCl (aq) + H2O (l)

asked Feb 3 in Chemical thermodynamics by Doretha13733 (390 points)

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Consider an electrochemical cell containing a copper electrode in a 0.5 M CuSO4 solution and a silver electrode in a 1.0 M AgNO3 solution. Calculate the current density at a temperature of 25°C given that the copper electrode has a surface area of 5 cm² and the silver electrode has a surface area of 10 cm². The standard reduction potentials for Cu²⁺ and Ag⁺ are -0.34 V and 0.80 V, respectively. Use the Nernst equation to calculate the cell potential and then use Ohm's law to calculate the current density.

asked Feb 3 in ElectroChemistry by SimaSimone3 (510 points)

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Calculate the standard enthalpy of formation of propane (C3H8) given the following data:- Standard enthalpy of formation of CO2(g) = -393.5 kJ/mol- Standard enthalpy of formation of H2O(l) = -285.8 kJ/mol- Standard enthalpy of combustion of propane at constant pressure = -2220.1 kJ/mol

asked Feb 3 in Chemical thermodynamics by ShannaFord50 (460 points)

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