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Calculate the standard enthalpy change for the sublimation of iodine (I2) if 1 mole of I2(s) is converted to 1 mole of I2(g) at 25°C and 1 bar pressure. Given the following information:- The standard enthalpy of fusion of I2 is 15.4 kJ/mol- The standard enthalpy of vaporization of I2 is 41.3 kJ/mol- The standard entropy change for the sublimation of I2 is 62.4 J/mol K.

asked 5 days ago in Chemical thermodynamics by LindsayI610 (390 points)

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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 5 days ago in Chemical thermodynamics by ClarissaMcAl (350 points)

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Calculate the standard enthalpy change (∆H°) of combustion for methane gas (CH4) given that the heat of formation (∆Hf°) for methane is -74.87 kJ/mol and the heat of formation (∆Hf°) for carbon dioxide (CO2) is -393.51 kJ/mol, and the heat of formation (∆Hf°) for water (H2O) is -285.83 kJ/mol.

asked 5 days ago in Chemical thermodynamics by MichellHenni (430 points)

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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 5 days ago in ElectroChemistry by AnnetteConne (550 points)

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Calculate the reaction quotient (Qc) for the following chemical reaction at 25°C: 2SO2(g) + O2(g) ⟶ 2SO3(g)Given the following concentration values:[SO2] = 0.1 M[O2] = 0.05 M[SO3] = 0.3 MWhat is the reaction quotient Qc for this reaction? Is the reaction at equilibrium? If not, in which direction will the reaction proceed to reach equilibrium?

asked 5 days ago in Chemical thermodynamics by LawrenceDyal (530 points)

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Calculate the reaction quotient (Q) for the following chemical reaction at a given temperature and pressure: 2 SO2 (g) + O2 (g) ⟶ 2 SO3 (g) The initial concentrations of SO2, O2, and SO3 are 0.2 M, 0.1 M, and 0.3 M, respectively, at a total pressure of 3 atm and a temperature of 298 K.

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

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How does changing the stoichiometric ratio of reactants affect the reaction rate of the chemical reaction between acid and calcium carbonate?

asked 5 days ago in Chemical kinetics by PetraGarrard (510 points)

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Compute the electronic band structure, density of states, and optical properties (absorption spectrum, reflectivity, and refractive index) of a graphene sheet using Density Functional Theory (DFT) calculations. Compare the results with experimental measurements and discuss the discrepancies observed, if any.

asked 4 days ago in Computational Chemistry by NannieSerna1 (210 points)

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Calculate the standard enthalpy change and the standard entropy change for the reaction: 2HCl(g) + Mg(s) → MgCl2(s) + H2(g) Given the following standard enthalpy of formation values: - HCl(g) = -92.31 kJ/mol - MgCl2(s) = -641.8 kJ/mol - H2(g) = 0 kJ/mol - Mg(s) = 0 kJ/mol Also given the following standard molar entropy values:- HCl(g) = 186.9 J/Kmol - MgCl2(s) = 138.53 J/Kmol - H2(g) = 130.7 J/Kmol - Mg(s) = 32.85 J/Kmol

asked 5 days ago in Inorganic Chemistry by GrettaFinney (270 points)

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Calculate the standard enthalpy change (∆H°) for the precipitation reaction between aqueous solutions of silver nitrate (AgNO3) and sodium chloride (NaCl) to form solid silver chloride (AgCl), given that 50.0 mL of 0.100 M AgNO3 and 50.0 mL of 0.100 M NaCl were combined in a calorimeter and the temperature change was recorded as -2.5°C.

asked 5 days ago in Chemical thermodynamics by StewartLivin (490 points)

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Calculate the standard enthalpy change (∆H°) for the formation of ammonia (NH3) at 298 K using the following data: N2(g) + 3H2(g) → 2NH3(g) ∆H° = −92.4 kJ/mol Hint: Standard enthalpy change (∆H°) for a reaction is calculated by taking the sum of the standard enthalpies of the products minus the sum of the standard enthalpies of the reactants.

asked 5 days ago in Chemical thermodynamics by IrisHammond9 (470 points)

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Calculate the standard enthalpy change for the reaction: 2C2H5OH(l) + 9O2(g) -> 6CO2(g) + 8H2O(l) given that the standard enthalpy of formation for C2H5OH(l) is -278 kJ/mol, for CO2(g) is -394 kJ/mol and for H2O(l) is -286 kJ/mol.

asked 5 days ago in Chemical thermodynamics by BessieBrobst (410 points)

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How does changing the reaction conditions, such as the concentration of reactants or the temperature, affect the selectivity of a chemical reaction? Specifically, investigate the effect of varying the concentration of reactants on the selectivity of reaction X.

asked 5 days ago in Chemical kinetics by Fannie707407 (330 points)

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How does changing the concentration of reactants affect the rate of reaction and impact the overall profitability of the chemical reaction?

asked 5 days ago in Chemical kinetics by AshleeB16686 (490 points)

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Calculate the standard enthalpy change for the neutralization reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH) in aqueous solutions. The balanced chemical equation for the reaction is as follows:HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l) Given the enthalpy of formation for HCl(aq) is -167.2 kJ/mol, NaOH(aq) is -469.14 kJ/mol, NaCl(aq) is -407.3 kJ/mol, and H2O(l) is -285.83 kJ/mol. The reaction is carried out at standard temperature and pressure.

asked 5 days ago in Chemical thermodynamics by Kindra62Z818 (370 points)

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

asked 5 days ago in Chemical thermodynamics by AlbertoLarna (550 points)

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Calculate the percent composition of copper sulfate pentahydrate (CuSO4 • 5H2O).

asked 5 days ago in Inorganic Chemistry by RoccoPreece (370 points)

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How does changing the reactant concentration affect the rate constant of a complex reaction mechanism, and can this relationship be used to predict changes in the overall reaction rate?

asked 5 days ago in Chemical kinetics by PaulinaSecco (390 points)

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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 of water is 40.7 kJ/mol. (The molar mass of water is 18.015 g/mol.)

asked 5 days ago in Chemical thermodynamics by ENCIsabel625 (630 points)

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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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