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Consider a closed system undergoing an irreversible expansion at constant pressure, calculate the change in entropy of the system if the initial and final volumes are V1 and V2, respectively, and assuming ideal gas behavior.

asked Feb 3 in Physical Chemistry by JohnetteVerd (310 points)

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What is the effect of changing the concentration of reaction intermediates on the rate of the chemical reaction?

asked Feb 3 in Chemical kinetics by DeneenDamron (390 points)

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Consider the chemical reaction A(g) + B(g) ↔ 2C(g). At equilibrium, the concentration of A is 0.25 M, the concentration of B is 0.15 M, and the concentration of C is 0.40 M. What is the equilibrium constant for this reaction at the given temperature?

asked Feb 3 in Chemical equilibrium by ShelaSleeman (290 points)

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How does changing the temperature affect the conformation of a polymer chain in a Monte Carlo simulation?

asked Feb 3 in Computational Chemistry by AlannahMuntz (430 points)

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Considering the Coordination chemistry of transition metals, how would increasing the size of the ligands affect the stability of a coordination compound?

asked Feb 3 in Coordination Chemistry by BillyHedges (230 points)

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How does changing the pH of a solution affect the formation of a complex ion using the example of [Cu(H2O)6]2+ forming [Cu(NH3)4(H2O)2]2+ at different pH values? Provide an explanation based on Le Chatelier's principle.

asked Feb 3 in Chemical equilibrium by KrystalFarle (270 points)

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How does changing the concentration of reactants affect the rate and sustainability of a specific chemical reaction? Provide experimental evidence to support your answer.

asked Feb 3 in Chemical kinetics by DanielleCand (610 points)

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Consider the following redox reaction:Cu(s) + 2Ag+(aq) → Cu2+(aq) + 2Ag(s)Calculate the standard free energy change (ΔG°) for the reaction at 298K, given that the standard reduction potentials for Cu2+(aq)/Cu(s) and Ag+(aq)/Ag(s) are +0.34V and +0.80V, respectively.

asked Feb 3 in Chemical thermodynamics by ClaudiaGut87 (230 points)

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What is the effect of changing the concentration of one reactant on the equilibrium constant of a reaction with a known rate?

asked Feb 3 in Chemical kinetics by VickieThornh (350 points)

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How does changing the pH affect the equilibrium constant (Kf) for the formation of Fe(CN)6 4- complex ion in a solution containing Fe3+ and CN- ions? Provide a detailed explanation of the effect of pH on the equilibrium constant for the reaction.

asked Feb 3 in Chemical equilibrium by Refugio10Z96 (310 points)

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How does changing the molecular weight of polyethylene affect its mechanical properties, specifically in terms of its use as a biomaterial for joint replacements?

asked Feb 3 in Materials Chemistry by CooperBlosse (470 points)

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What is the effect of changing the concentration of reactants and products on the equilibrium constant and reaction rate of a chemical reaction?

asked Feb 3 in Chemical kinetics by OmarPelloe6 (390 points)

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Calculate the standard enthalpy change for the vaporization of 1 mole of water at 100°C and 1 atm pressure. The enthalpy of formation of liquid water is -285.8 kJ/mol and the enthalpy of formation of water vapor is -241.8 kJ/mol.

asked Feb 3 in Chemical thermodynamics by Ira903645143 (370 points)

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How does changing the mass of the atoms in a molecule affect its vibrational frequencies and infrared spectra, and how can quantum chemistry calculations be used to predict these changes?

asked Feb 3 in Quantum Chemistry by HJREarl88961 (370 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 ClariceOrozc (330 points)

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How does changing the concentration of reactants affect the reaction rate in the chemical reaction between hydrochloric acid and magnesium?

asked Feb 3 in Chemical kinetics by AlvinPayne11 (350 points)

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Calculate the rate constant at 300 K for a gas phase reaction with a rate of 0.025 M/s and an initial concentration of 0.10 M. The reaction is second order in the concentration of reactants.

asked Feb 3 in Physical Chemistry by PreciousS02 (410 points)

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Calculate the standard enthalpy change (∆H°) for the neutralization reaction of 50.0 mL of 0.100 M HCl with 75.0 mL of 0.0750 M NaOH at a constant pressure of 1 atm and a temperature of 25°C.

asked Feb 3 in Chemical thermodynamics by TuyetSticht2 (330 points)

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Calculate the reaction quotient, Qc, for the following reaction:2NO2(g) + 7H2(g) → 2NH3(g) + 4H2O(g)at a temperature of 300 K and a pressure of 0.5 atm for each gas species. The equilibrium constants, Kc, at the same temperature and pressure are:Kc = 0.0080 for the reverse reactionKc = 7.2 × 10^-7 for the forward reaction

asked Feb 3 in Chemical thermodynamics by CalvinGurule (410 points)

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Calculate the power output of a galvanic cell given that the cell potential is 1.8 V and the current passing through the circuit is 2.5 A. The electrochemical reaction taking place in the cell is the oxidation of Zinc and reduction of Copper. The standard reduction potentials are +0.76 V for copper and -0.76 V for zinc. The concentration of Zinc ions is 1.0 M whereas Copper ions concentration is 0.1 M. Determine the power output of the cell.

asked Feb 3 in ElectroChemistry by KassieNewbig (390 points)

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