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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 Ofelia983738 (690 points)

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Calculate the standard enthalpy change of the oxidation of hydrogen gas (H2) to form water (H2O) at 298 K, given that the standard enthalpy of formation of water is -285.8 kJ/mol and the bond dissociation enthalpy of the H-H bond is 436 kJ/mol.

asked Feb 3 in ThermoChemistry by LaurenDelpra (210 points)

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How does changing the reaction conditions, such as temperature and pressure, affect the properties of the final product in the production of polymers?

asked Feb 3 in Chemical engineering by ArdenHutto33 (250 points)

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Calculate the standard enthalpy change of the following reduction reaction if the standard enthalpy of formation of FeO is -272.0 kJ/mol and that of Fe is 0 kJ/mol.FeO(s) + H2(g) → Fe(s) + H2O(l)

asked Feb 3 in ThermoChemistry by GiseleR2384 (250 points)

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Calculate the standard enthalpy change for the phase transition of solid ice to liquid water, given the heat of fusion of ice is 6.01 kJ/mol and the molar heat capacity of water is 75.3 J/mol·K.

asked Feb 3 in Chemical thermodynamics by Aja28I404541 (430 points)

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Calculate the pH of a 0.2 M solution of acetic acid (Ka = 1.8 x 10^-5) at 25°C.

asked Feb 3 in Chemical reactions by JGGDeb778327 (430 points)

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Calculate the standard electrode potential of copper electrode if the Cu2+ ion concentration is 1.0 M and the electrode is at 25°C. The half-cell reaction is Cu2+(aq) + 2e- → Cu(s).

asked Feb 3 in ElectroChemistry by Arlie87Z0635 (510 points)

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Calculate the standard electrode potential for the redox reaction: Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s)if the standard electrode potentials for Zn2+/Zn and Cu2+/Cu half-cells are -0.76V and +0.34V, respectively.

asked Feb 3 in Chemical thermodynamics by HarryWcc2527 (470 points)

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1 answer 34 views

Calculate the percentage change in the concentration of reactants and products in a chemical equilibrium when the concentration of a common ion is increased by 0.1M. The equilibrium constant for the reaction is Kc = 1.5 x 10^-5 M at a certain temperature.

asked Feb 3 in Chemical equilibrium by Terra8271834 (550 points)

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1 answer 27 views

Calculate the standard enthalpy change for the neutralization of 50 mL of 0.1 M hydrochloric acid with 50 mL of 0.1 M sodium hydroxide at a constant temperature of 25°C, given that the specific heat capacity of the resulting solution is 4.18 J/g°C and its density is 1 g/mL.

asked Feb 3 in Chemical thermodynamics by Georgetta69W (450 points)

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What is the effect of changing the concentration of reactants on the reaction rate and yield of a chemical reaction?

asked Feb 3 in Chemical kinetics by MarilouArnde (470 points)

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How does changing the temperature affect the equilibrium constant (Kc) and the formation of Fe(SCN)2+ complex ion from Fe3+ and SCN- ions?

asked Feb 3 in Chemical equilibrium by DyanGroom549 (350 points)

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Calculate the standard enthalpy change for the vaporization of 1 mole of water at 100°C, given that the enthalpy of fusion of water is 6.01 kJ/mol and the enthalpy of vaporization of water is 40.7 kJ/mol.

asked Feb 3 in Chemical thermodynamics by JannetteVdl (470 points)

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1 answer 31 views

Calculate the standard electrode potential for the following redox reaction: Zn(s) + Cu²⁺(aq) → Zn²⁺(aq) + Cu(s)Given that the standard electrode potential for the Zn²⁺/Zn electrode is -0.76V and for the Cu²⁺/Cu electrode is +0.34V.

asked Feb 3 in ElectroChemistry by AnnettSheppa (350 points)

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Calculate the resistance of a electrochemical cell at 25°C if the standard reduction potential of the anode is -1.36 V and the standard reduction potential of the cathode is +0.40 V. The solution contains 0.1 M CuSO4 and 0.01 M ZnSO4. The distance between the two electrodes is 5 cm and the cross-sectional area of each electrode is 2.5 cm².

asked Feb 3 in ElectroChemistry by CruzDenker57 (210 points)

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1 answer 35 views

How does changing the surface ligands of gold nanoparticles affect their stability and reactivity in aqueous solution, as analyzed through molecular dynamics simulations?

asked Feb 3 in Computational Chemistry by BryanBouldin (250 points)

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1 answer 28 views

Calculate the standard enthalpy change for the combustion of methane gas at standard conditions, given the following balanced chemical equation:CH4(g) + 2O2(g) -> CO2(g) + 2H2O(l)Note: Standard conditions refer to a temperature of 25°C and a pressure of 1 atm.

asked Feb 3 in Chemical thermodynamics by VilmaOlivas5 (350 points)

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1 answer 37 views

How does changing the surface chemistry of a solid surface affect the adsorption of proteins, and how can this knowledge be applied to improve biomaterials design for medical implants?

asked Feb 3 in Surface Chemistry by Mandy1426166 (630 points)

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1 answer 40 views

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

asked Feb 3 in Chemical kinetics by RoyalLemons0 (330 points)

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1 answer 23 views

Calculate the standard Gibbs free energy change (ΔG°) for the electrochemical reaction of the reduction of copper ions (Cu2+) to copper atoms (Cu) using a copper electrode in a solution of copper sulfate (CuSO4) at 25°C. The standard reduction potential of the copper ion is +0.34 V.

asked Feb 3 in ElectroChemistry by ClariceScott (290 points)

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