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Calculate the standard electrode potential for the following half-reaction: Cu2+(aq) + 2e- --> Cu(s) given that the standard reduction potential for Cu2+(aq) is +0.34 V.

asked Feb 3 in ElectroChemistry by KaraMcRae960 (2.5k points)

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How does changing the structure of a biomaterial affect its mechanical properties and ability to support cell growth for use in tissue engineering applications?

asked Feb 3 in Materials Chemistry by MatthewStore (1.3k points)

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Calculate the standard enthalpy change for the reduction of iron(III) oxide to iron using the following balanced chemical equation:Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g)Given that the standard enthalpy change of formation for Fe2O3(s) is -824.2 kJ/mol, the standard enthalpy change of formation for CO2(g) is -393.5 kJ/mol, and the standard enthalpy change of formation for Fe(s) is 0 kJ/mol. Assume all reactants and products are in their standard states.

asked Feb 3 in ThermoChemistry by BeatrisSanfo (1.7k points)

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Calculate the standard enthalpy of formation of carbon dioxide given the following information: - Standard enthalpy of formation of graphite = 0 kJ/mol- Standard enthalpy of formation of oxygen gas = 0 kJ/mol- Enthalpy of combustion of graphite = -393.5 kJ/mol- Enthalpy of combustion of carbon monoxide = -283.0 kJ/mol- Enthalpy of combustion of hydrogen gas = -285.8 kJ/mol

asked Feb 3 in Chemical thermodynamics by AnjaAbt20068 (2.0k points)

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Calculate the standard enthalpy of formation of carbon dioxide gas (CO2) given the following information: C(s) + O2(g) → CO2(g) ΔH = -393.5 kJ/mol H2(g) + 1/2O2(g) → H2O(l) ΔH = -285.8 kJ/mol 2C(s) + 2H2(g) + 5/2O2(g) → 2CO2(g) + 2H2O(l) ΔH = -890.4 kJ/mol

asked Feb 3 in ThermoChemistry by BonnieSayre (2.1k points)

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How does changing the geometry and size of a molecule affect its electronic excited states and optical properties, and how can this information be accurately calculated using quantum chemistry methods?

asked Feb 3 in Quantum Chemistry by JedShackell5 (1.8k points)

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Calculate the standard enthalpy change for the formation of water vapor (H2O (g)) from its elements, given that the standard enthalpy of formation of hydrogen gas (H2(g)) is -241.8 kJ/mol and the standard enthalpy of formation of oxygen gas (O2(g)) is 0 kJ/mol.

asked Feb 3 in Chemical thermodynamics by DeenaTrundle (2.2k points)

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Calculate the standard enthalpy of formation for hydrogen peroxide (H2O2) at 298 K, given that the standard enthalpy change of formation for water (H2O) is -285.8 kJ/mol and the standard enthalpy change of formation for oxygen gas (O2) is 0 kJ/mol.

asked Feb 3 in Chemical thermodynamics by AddieFrayne (1.7k points)

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Calculate the standard enthalpy change for the reaction: 2NaOH (s) + H2SO4 (aq) → Na2SO4 (aq) + 2H2O (l)given that the standard enthalpy of formation of Na2SO4 (aq) is -1385 kJ/mol, and the standard enthalpies of formation of NaOH (s), H2SO4 (aq) and H2O (l) are -425 kJ/mol, -814 kJ/mol and -286 kJ/mol respectively.

asked Feb 3 in Chemical thermodynamics by FrancescaTor (2.0k points)

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1 answer 54 views

Calculate the standard free energy change for the following redox reaction at 298 K:2 Mg(s) + O2(g) -> 2 MgO(s)(The standard reduction potential for Mg2+/Mg is -2.37 V and for O2/H2O is +1.23 V)

asked Feb 3 in Chemical thermodynamics by CheryleCass8 (1.7k points)

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Consider the electrochemical cell with the following half-cell reactions: Fe3+ (aq) + e- → Fe2+ (aq) E° = +0.771 V and Cd2+ (aq) + 2e- → Cd (s) E° = -0.403 V What is the overall cell potential, Ecell, under standard conditions? Which species will be reduced at the cathode? Which electrode is the anode? Justify your choices using the given standard reduction potentials.

asked Feb 3 in ElectroChemistry by AidanSewell2 (1.9k points)

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Calculate the standard enthalpy change for the following reaction at 25°C given the enthalpies of formation (in kJ/mol) of the compounds involved:CaCO3(s) + 2HCl(aq) → CaCl2(aq) + CO2(g) + H2O(l)Hf(CaCO3) = -1206.9 kJ/molHf(CaCl2) = -795.8 kJ/molHf(CO2) = -393.5 kJ/molHf(H2O) = -285.8 kJ/molHf(HCl) = -92.31 kJ/mol

asked Feb 3 in Chemical thermodynamics by CherylDooley (1.7k points)

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1 answer 51 views

Describe the step-by-step procedure for synthesizing polyvinylpyrrolidone from vinylpyrrolidone monomer, including the necessary reagents, temperatures, and reaction conditions.

asked Feb 3 in Chemical synthesis by XHQMikel9006 (2.0k points)

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Consider a zinc-copper electrochemical cell in which the half-reaction Zn(s) → Zn²⁺(aq) + 2e⁻ occurs at the anode and the half-reaction Cu²⁺(aq) + 2e⁻ → Cu(s) occurs at the cathode. If the concentration of Zn²⁺(aq) in the anode compartment is 0.500 M and the concentration of Cu²⁺(aq) in the cathode compartment is 0.0250 M, calculate the current density when a current of 2.50 A is passed through the cell. (Assume that the temperature and pressure are constant and that the electrodes are inert.)

asked Feb 3 in ElectroChemistry by FaustinoBon9 (2.0k 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 NicholasTwm2 (2.0k points)

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1 answer 57 views

Calculate the standard enthalpy change for the neutralization of 25 mL of 0.10 M hydrochloric acid with 25 mL of 0.10 M sodium hydroxide. Assume the specific heat capacity of the solution to be 4.18 J/(g*K) and the density of the solution to be 1.00 g/mL. The temperature change observed during the reaction was 4.5°C.

asked Feb 3 in Chemical thermodynamics by GlenCaringto (2.1k points)

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Calculate the standard enthalpy of formation of methane gas (CH4) given the standard enthalpies of formation for carbon dioxide (CO2) (-393.5 kJ/mol) and water vapor (H2O) (-241.8 kJ/mol).

asked Feb 3 in ThermoChemistry by LeroyBothwel (1.9k points)

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Calculate the standard enthalpy change for the sublimation of iodine solid to iodine gas at 298 K with the following given data: - Standard enthalpy of fusion of iodine: 15.52 kJ/mol- Standard molar entropy of iodine solid: 62.7 J/K/mol- Standard molar entropy of iodine gas: 260.6 J/K/mol

asked Feb 3 in Chemical thermodynamics by ArlenBieber1 (1.9k points)

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1 answer 58 views

Calculate the standard enthalpy change for the combustion of methane (CH4) at constant pressure, given that the standard enthalpies of formation are -74.87 kJ/mol for methane and -393.51 kJ/mol for carbon dioxide (CO2), and 2H2(g) + O2(g) → 2H2O(l) has a standard enthalpy change of -571.66 kJ/mol.

asked Feb 3 in Chemical thermodynamics by ChuWegener2 (2.1k points)

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1 answer 61 views

Calculate the standard electrode potential for the following cell: Mg (s) | Mg2+ (aq, 0.10 M) || Ag+ (aq, 1.0 M) | Ag (s) Given: E°(Ag+/Ag) = +0.80 V E°(Mg2+/Mg) = -2.37 V

asked Feb 3 in ElectroChemistry by Sylvia941924 (1.9k points)

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