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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 Feb 3 in Chemical thermodynamics by HowardAlmond (1.8k 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 Feb 3 in Chemical equilibrium by JoelPrentice (1.4k points)

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Calculate the standard free energy change for the following redox reaction:2Fe^2+ (aq) + H2O2 (aq) + 2H+ (aq) -> 2Fe^3+ (aq) + 2H2O (l) Given the following reduction potentials at standard conditions:Fe3+ (aq) + e- -> Fe2+ (aq) E° = 0.77 VH2O2 (aq) + 2H+ (aq) + 2e- -> 2H2O (l) E° = 1.78 V

asked Feb 3 in Chemical thermodynamics by ClementMackr (2.5k points)

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

asked Feb 3 in Chemical kinetics by MckenzieWxs (1.6k points)

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Calculate the standard enthalpy change of the reaction of 2 moles of carbon monoxide and 1 mole of oxygen gas to form 2 moles of carbon dioxide gas, given that the enthalpy change for the decomposition of 2 moles of carbon dioxide to 2 moles of carbon monoxide and 1 mole of oxygen gas is -566 kJ/mol, and the enthalpy change for the combustion of 1 mole of carbon to form carbon dioxide gas is -394 kJ/mol. Use Hess's Law to solve the problem.

asked Feb 3 in Chemical reactions by DanClay0864 (2.1k points)

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Calculate the standard free energy change for the following redox reaction at 25°C:2Fe(s) + 3/2 O2(g) -> Fe2O3(s)Given the following half-reactions and their standard reduction potentials at 25°C:Fe2O3(s) + 3H2O(l) + 2e- -> 2Fe(OH)3(s) E°= -0.33VO2(g) + 4H+(aq) + 4e- -> 2H2O(l) E°= +1.23VFe(OH)3(s) -> Fe3+(aq) + 3OH-(aq) E°= -0.25V

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

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Calculate the standard enthalpy change for the phase transition reaction of solid carbon dioxide (dry ice) at -78.5°C to gaseous carbon dioxide at 1 atm and 25°C given that the enthalpy of formation of solid carbon dioxide and gaseous carbon dioxide are -393.5 kJ/mol and -393.5 kJ/mol, respectively.

asked Feb 3 in Chemical thermodynamics by KariMcCleary (1.5k points)

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Calculate the polarization in an electrochemical cell consisting of a zinc electrode and a copper electrode. The electrode potentials of zinc and copper are -0.76 V and +0.34 V, respectively. The resistance of the electrolyte solution between the electrodes is 10 ohms, and the current flowing through the cell is 0.5 A.

asked Feb 3 in ElectroChemistry by ClydeC545764 (2.2k points)

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How does changing the concentration of reactants and products affect the reaction rate and equilibrium constant for the reaction between hydrogen and iodine?

asked Feb 3 in Chemical kinetics by FletaNesmith (2.1k points)

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What is the effect of changing the concentration of reactants or products on the reaction rate at equilibrium?

asked Feb 3 in Chemical kinetics by CDEMargherit (1.7k points)

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Calculate the standard enthalpy change for the neutralization reaction between hydrochloric acid and sodium hydroxide, given the balanced chemical equation: HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l) and the enthalpy change of formation values: ∆Hf°(NaCl(aq)) = -407.3 kJ/mol ∆Hf°(H2O(l)) = -285.83 kJ/mol ∆Hf°(HCl(aq)) = -167.2 kJ/mol ∆Hf°(NaOH(aq)) = -469.11 kJ/mol

asked Feb 3 in Chemical thermodynamics by MireyaFlaher (1.6k points)

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How do chaperone proteins assist in the folding of newly synthesized polypeptides?

asked Feb 3 in BioChemistry by RubyPeltier8 (2.0k points)

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How does changing the number of unpaired electrons in a molecule affect its magnetic properties, and how can these changes be calculated using quantum chemistry methods?

asked Feb 3 in Quantum Chemistry by Samira94683 (2.2k points)

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Calculate the standard enthalpy change for the reaction of [Co(H2O)6]2+(aq) with 2 Cl-(aq) to form [CoCl4]2-(aq) and 6 H2O(l) at a temperature of 298 K. Given the following thermodynamic data:[Co(H2O)6]2+(aq) + 4 Cl-(aq) → [CoCl4]2-(aq) + 6 H2O(l) ΔH°= -98.7 kJ mol-1[Co(H2O)6]2+(aq) + 2 Cl-(aq) → [CoCl4]2-(aq) + 4 H2O(l) ΔH°= -65.5 kJ mol-1Assume that the enthalpy of hydration for Cl- (aq) is -364 kJ mol-1.

asked Feb 3 in Chemical thermodynamics by AdelaideDunn (1.8k points)

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How does changing the temperature or pressure affect the properties of a solid-liquid transition in a particular material, as determined by Monte Carlo simulations?

asked Feb 3 in Computational Chemistry by LorenaReinha (1.8k points)

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Calculate the standard enthalpy change for the neutralization of 25.0 mL of 1.0 M hydrochloric acid (HCl) with 25.0 mL of 1.0 M sodium hydroxide (NaOH) solution at 25°C, given that the specific heat capacity of the solutions is 4.18 J/g°C, and the density of the solutions is 1.00 g/mL.

asked Feb 3 in Chemical thermodynamics by LannyNewell (1.8k 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 Feb 3 in Chemical kinetics by SterlingElki (2.2k 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 Feb 3 in Chemical thermodynamics by MarciaPerry5 (1.6k points)

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1 answer 29 views

Considering carbohydrate metabolism and regulation in the human body, how does the regulation of glycolysis and gluconeogenesis work to maintain blood glucose levels during periods of fasting or intense exercise? Include both the enzymes involved and the hormonal regulation mechanisms in your answer.

asked Feb 3 in BioChemistry by TeshaPennell (1.6k points)

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Considering a molecule with a known ground state configuration, how can one determine the electronic excited states and their corresponding optical properties using computational methods in quantum chemistry?

asked Feb 3 in Quantum Chemistry by LillianaY16 (1.7k points)

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