Answers by TheScientist

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What is the standard free energy change of the following redox reaction at 298 K and 1 bar?2Fe2+(aq) + H2O2(aq) + 2H+(aq) → 2Fe3+(aq) + 2H2O(l)Given the following standard reduction potentials:Fe3+/Fe2+ = +0.771 VH2O2/O2 = +0.695 V

answered Mar 1 in Chemical thermodynamics

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What is the standard free energy change (ΔG°) for the following redox reaction at 298 K?2Fe2+ (aq) + Cl2 (g) → 2Fe3+ (aq) + 2Cl- (aq)Given data:E°(Fe3+|Fe2+) = +0.77 V; E°(Cl2|Cl-) = +1.36 V

answered Mar 1 in Chemical thermodynamics

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What is the standard free energy change for the following redox reaction at 25°C?2Fe3+(aq) + Sn2+(aq) → 2Fe2+(aq) + Sn4+(aq) Given: E°(Fe3+/Fe2+) = 0.771 V E°(Sn4+/Sn2+) = 0.150 V R = 8.314 J/K•mol F = 96,485 C/mol

answered Mar 1 in Chemical thermodynamics

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What is the standard free energy change for the following redox reaction at 298 K?Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s)Given: E°(Cu2+/Cu) = 0.34 V and E°(Zn2+/Zn) = -0.76 V

answered Mar 1 in Chemical thermodynamics

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What is the standard free energy change for the redox reaction of 2 Fe^2+(aq) + Cl2(g) → 2 Fe^3+(aq) + 2 Cl^-(aq) at 298 K?

answered Mar 1 in Chemical thermodynamics

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What is the standard free energy change for the following redox reaction at 298K?Cr2O7(2-) + 14H(+) + 6e(-) → 2Cr(3+) + 7H2O(l)Given: E°(Cr2O7(2-)/Cr(3+)) = 1.33 V and E°(H2O/O2) = -0.82 V.

answered Mar 1 in Chemical thermodynamics

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What is the standard entropy change of the combustion reaction of methane gas under standard conditions?

answered Mar 1 in Chemical thermodynamics

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What is the standard enthalpy of formation of methane gas (CH4) given the following bond energies: C-C = 347 kJ/molC-H = 413 kJ/mol (Hint: Use the formula ∆Hf° = ∑(bonds broken) - ∑(bonds formed))

answered Mar 1 in Chemical bonding

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What is the standard enthalpy of formation of methane (CH4) given the following bond dissociation energies (in kJ/mol): C-H = 413, C-C = 348, C=C = 614, C≡C = 837, H-H = 436?

answered Mar 1 in ThermoChemistry

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What is the standard enthalpy change when 5 grams of sodium chloride (NaCl) dissolves in 100 mL of water at a temperature of 25°C?

answered Mar 1 in Chemical thermodynamics

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What is the standard enthalpy change of the dissolution of 10 grams of sodium chloride in 250 milliliters of water at 25°C, given that the molar enthalpy of dissolution of sodium chloride is -3.9 kilojoules per mole?

answered Mar 1 in Chemical thermodynamics

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What is the standard enthalpy change of solution of 3.5 g of sodium hydroxide (NaOH) in 50 mL of water at a constant temperature of 25 °C?

answered Mar 1 in ThermoChemistry

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In an experiment, 50 mL of 1 M HCl solution was mixed with 50 mL of 1 M NaOH solution. The temperature change was recorded as 10°C. Calculate the standard enthalpy change of neutralization for the reaction between HCl and NaOH.

answered Mar 1 in Chemical thermodynamics

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What is the standard enthalpy change of dissolution for 5.00 grams of solid sodium hydroxide (NaOH) in 100.0 mL of water at 25°C? Given: The molar enthalpy of dissolution of NaOH is -44.51 kJ/mol and the density of water is 0.997 g/mL.

answered Mar 1 in ThermoChemistry

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What is the standard enthalpy change of combustion for methane gas (CH4) at 298 K? Given that the standard enthalpy of formation of CO2(g) and H2O(l) are -393.5 kJ/mol and -285.8 kJ/mol, respectively.

answered Mar 1 in Chemical thermodynamics

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What is the standard enthalpy change of combustion (ΔH°c) for propane (C3H8) gas at 298 K, given the balanced chemical equation: C3H8(g) + 5O2(g) -> 3CO2(g) + 4H2O(g)?

answered Mar 1 in Physical Chemistry

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What is the standard enthalpy change when 50.0 mL of 0.200 M HCl is mixed with 50.0 mL of 0.200 M NaOH to form NaCl(aq) and H2O(l) at 25°C? Given: The specific heat capacity of the solution is 4.18 J/(g°C) and the density of the solution is 1.00 g/mL.

answered Mar 1 in Chemical thermodynamics

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What is the standard enthalpy change for the following reaction, where 2 moles of solid iron (Fe) reacts with 1 mole of oxygen gas (O2) to produce 2 moles of solid iron (III) oxide (Fe2O3)? 4Fe(s) + 3O2(g) -> 2Fe2O3(s)

answered Mar 1 in Chemical thermodynamics

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What is the standard enthalpy change for the vaporization of 50g of water at 100°C, given that the molar enthalpy of vaporization of water is 40.7 kJ/mol?

answered Mar 1 in Chemical thermodynamics

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What is the standard enthalpy change for the vaporization of 50g of water at its boiling point (100°C) and 1 atm (pressure of the atmosphere)? Given that the standard enthalpy of vaporization of water is 40.79 kJ/mol.

answered Mar 1 in Chemical thermodynamics

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