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Calculate the standard enthalpy change for the vaporization of 25.0 g of water at 100°C, given that the molar enthalpy of vaporization is 40.7 kJ/mol.

asked 5 days ago in Chemical thermodynamics by LillieIst935 (310 points)

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Calculate the standard reaction entropy of the reaction: 2Fe(s) + 3/2O2(g) --> Fe2O3(s) given that the standard enthalpy of the reaction is -824.2 kJ/mol at 298K.

asked 5 days ago in Inorganic Chemistry by Elissa821461 (290 points)

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Calculate the standard electrode potential for the redox reaction between copper and silver ions, given the following half-equations:Cu2+(aq) + 2e- → Cu(s) E° = +0.34 VAg+(aq) + e- → Ag(s) E° = +0.80 V

asked 5 days ago in Chemical thermodynamics by Lea50604912 (270 points)

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Calculate the standard enthalpy of formation of water (H2O) given the following information:- The standard enthalpy of formation of hydrogen gas (H2) is 0 kJ/mol- The standard enthalpy of formation of oxygen gas (O2) is 0 kJ/mol- The standard enthalpy of combustion of hydrogen gas is -286 kJ/mol- The standard enthalpy of combustion of carbon (C) is -394 kJ/mol- The standard enthalpy of combustion of methane gas (CH4) is -890 kJ/mol

asked 5 days ago in ThermoChemistry by Bradley53M38 (490 points)

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Calculate the standard enthalpy of formation of water (H2O) given the following information: ΔHf° of H2(g) = 0 kJ/molΔHf° of O2(g) = 0 kJ/molΔHf° of H2O2(l) = -188.2 kJ/mol

asked 5 days ago in ThermoChemistry by RBFSuzette64 (570 points)

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How does changing the concentration of reactants affect the reaction rate and ultimately the profitability of a chemical reaction in the manufacturing of a particular product?

asked 5 days ago in Chemical kinetics by RenaChesser8 (710 points)

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Calculate the standard electrode potential for the following redox reaction at 298K:Fe3+(aq) + e- → Fe2+(aq) Given the E°(Fe3+/Fe2+) = +0.77V.

asked 5 days ago in Chemical thermodynamics by MartySquires (610 points)

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Calculate the standard enthalpy change (∆H°) for the vaporization of 10 grams of water at 100°C, given that the molar heat of vaporization of water is 40.7 kJ/mol.

asked 5 days ago in Chemical thermodynamics by CarmaHazon9 (730 points)

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How does changing the stoichiometry of reactants in a chemical reaction affect the rate of reaction, and how can we experimentally investigate this relationship?

asked 5 days ago in Chemical kinetics by KellieRobert (430 points)

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Calculate the reaction quotient (Qc) for the chemical equation:2NO(g) + O2(g) ⇌ 2NO2(g)At a certain reaction conditions, the concentrations of NO, O2, and NO2 are 0.45 M, 0.25 M, and 0.60 M respectively. Determine if the reaction is at equilibrium and, if not, in which direction will it proceed to reach equilibrium.

asked 5 days ago in Chemical thermodynamics by EmanuelWelch (460 points)

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Calculate the standard enthalpy change for the fusion of 2.5 moles of ice at 0℃ to form water at 0℃. Given that the molar enthalpy of fusion of ice is 6.01 kJ/mol and the specific heat capacity of water is 4.18 J/g·℃.

asked 5 days ago in Chemical thermodynamics by TiaAmess6840 (630 points)

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Calculate the standard enthalpy change (ΔH°), standard entropy change (ΔS°) and standard Gibbs free energy change (ΔG°) of the reaction:2A(g) + 3B(g) → C(g) + 2D(g)given thatΔH°f[A(g)] = 200 kJ mol^-1Δ H°f [B(g)] = 100 kJ mol^-1Δ H°f [C(g)] = 400 kJ mol^-1Δ H°f [D(g)] = 0 kJ mol^-1ΔH°= -400 kJ mol^-1Temperature (T) = 298 KThe student needs to use their knowledge in quantum chemistry and thermodynamics to calculate the thermodynamic properties of the given reaction.

asked 5 days ago in Quantum Chemistry by Danielle4973 (510 points)

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Calculate the rate of electroplating of copper on a metallic surface at a current of 2.5 amperes for a duration of 3 hours using a copper nitrate solution with a concentration of 0.2 M. Given that the standard potential of the reduction reaction of Cu2+ to Cu is +0.34 V and the charge of one mole of electrons is 96500 C/mol.

asked 5 days ago in ElectroChemistry by DexterKier30 (350 points)

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How does changing the pH affect the equilibrium position of a redox reaction involving a weak acid and its conjugate base? Provide a specific example to illustrate your answer.

asked 5 days ago in Chemical equilibrium by RolandCoble3 (490 points)

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How does changing the electronic and magnetic properties of molecular magnets affect their potential applications in fields such as data storage and spintronics?

asked 5 days ago in Quantum Chemistry by MinervaRico (530 points)

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How does changing the pH affect the equilibrium position of an acid-base reaction between a weak acid and a strong base? Provide a brief explanation of the underlying principle and use an example to illustrate your answer.

asked 5 days ago in Chemical equilibrium by MaximilianLo (410 points)

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1 answer 28 views

Calculate the polarization that occurs in an electrochemical cell when a current of 2 A flows through it for 10 minutes. The electrode area is 25 cm², and the current efficiency is 95%. The activation energy is 80 kJ/mol, and the reaction quotient is 2.5 x 10⁻⁵. The temperature of the cell is 25°C. Find the polarization resistance and the total polarization of the cell.

asked 5 days ago in ElectroChemistry by DillonNhl224 (450 points)

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1 answer 35 views

How does changing the concentration of reactants and products affect the reaction rate of a reversible chemical reaction at equilibrium?

asked 5 days ago in Chemical kinetics by ElveraCook66 (330 points)

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How does changing the pH of a redox reaction affect the equilibrium position and what is the mathematical equation used to calculate the shift in equilibrium? Provide an example of a redox reaction and calculate the new equilibrium concentrations of the products and reactants when the pH is increased or decreased.

asked 5 days ago in Chemical equilibrium by ClemmieHeneg (410 points)

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Calculate the standard enthalpy change for the phase transition of water from liquid to ice at 0°C, given the following information: The molar heat capacity of liquid water, Cp = 75.3 J/mol K The molar heat capacity of ice, Cp = 36.6 J/mol K The enthalpy of fusion, ΔHfus = 6.01 kJ/mol

asked 5 days ago in Chemical thermodynamics by MinervaElder (610 points)

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