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Calculate the standard enthalpy change for the vaporization of 15 grams of water given that the molar enthalpy of vaporization of water is 40.7 kJ/mol.

asked Feb 3 in Chemical thermodynamics by LSCJoey08837 (2.2k points)

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

asked Feb 3 in Computational Chemistry by Tesha44V4191 (1.7k points)

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Design a distillation column for the separation of a mixture composed of 50% ethanol and 50% water. The column must produce a distillate that is at least 95% ethanol and a bottoms stream that is at most 5% ethanol. The feed rate is 1000 kg/h and the reflux ratio is to be determined by the student. Provide the complete design of the distillation column including the number of theoretical trays, feed tray location, and the diameter of the column.

asked Feb 3 in Chemical engineering by CamillePiazz (1.8k points)

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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 MarlaColes2 (2.1k points)

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How does changing the pH value of the reactant solution affect the rate of photochemical reactions in the presence of a particular photosensitizer?

asked Feb 3 in PhotoChemistry by DanielleVanw (2.3k points)

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Calculate the standard enthalpy change for the combustion of ethane (C2H6) given the balanced chemical equation:C2H6(g) + 3.5 O2(g) → 2CO2(g) + 3H2O(l)Assume all reactants and products are in standard states and use the following standard enthalpy of formation values:ΔHf°(C2H6) = -84.7 kJ/molΔHf°(CO2) = -393.5 kJ/molΔHf°(H2O) = -285.8 kJ/mol

asked Feb 3 in Chemical thermodynamics by SaraNis63941 (1.4k points)

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Calculate the standard electrode potential for a silver electrode in contact with a silver ion solution of concentration 0.010 M. The reduction half-equation is Ag+ + e- → Ag.

asked Feb 3 in ElectroChemistry by RyderShupe77 (1.7k points)

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Calculate the standard enthalpy of formation of carbon dioxide from its elements under standard conditions given the following information:- The standard enthalpy of combustion of carbon to CO2 is -393.5 kJ/mol- The standard enthalpy of combustion of hydrogen to H2O is -285.8 kJ/mol- The standard enthalpy of formation of water is -241.8 kJ/mol.Note: The standard enthalpy of formation of an element in its standard state is zero.

asked Feb 3 in ThermoChemistry by WilfredoWren (2.1k points)

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Calculate the standard enthalpy change for the fusion of 25 grams of ice at -10°C to liquid water at 20°C. The specific heat capacity of ice is 2.09 J/g°C, the specific heat capacity of water is 4.18 J/g°C, and the enthalpy of fusion of water is 6.01 kJ/mol.

asked Feb 3 in Chemical thermodynamics by DoraSturm903 (1.8k 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 Feb 3 in Chemical kinetics by LeannaCremea (1.6k points)

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Chemistry student, can you predict the products and balance the following double replacement chemical reaction: NaCl + AgNO3?

asked Feb 3 in Chemical reactions by MiquelPlx868 (2.3k points)

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Calculate the standard free energy change, ΔG°, for the following redox reaction if the standard reduction potential of Ag⁺/Ag is +0.80 V and the standard reduction potential of Cu²⁺/Cu is +0.34 V:Ag⁺(aq) + Cu(s) → Ag(s) + Cu²⁺(aq)

asked Feb 3 in Chemical thermodynamics by CorneliusBur (2.1k points)

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Calculate the standard enthalpy change for the formation of one mole of methane (CH4) gas given the following information: - Heat of combustion of methane gas is -890.36 kJ/mol - Heat of formation of water (H2O) liquid is -285.83 kJ/mol - Heat of formation of carbon dioxide (CO2) gas is -393.52 kJ/mol

asked Feb 3 in Chemical thermodynamics by OtisMacGilli (2.0k points)

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Calculate the standard enthalpy change for the precipitation reaction between aqueous silver nitrate (AgNO3) and aqueous sodium chloride (NaCl) to form solid silver chloride (AgCl) and aqueous sodium nitrate (NaNO3), given the following balanced chemical equation:AgNO3 (aq) + NaCl (aq) → AgCl (s) + NaNO3 (aq) Assume that the reaction takes place under standard conditions (25°C and 1 atm) and that all solutions are at 1 M concentration.

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

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Calculate the standard enthalpy change (∆H°) for the following reaction involving liquids:C6H12O6 (s) + 6O2 (g) → 6CO2 (g) + 6H2O (l)

asked Feb 3 in Chemical thermodynamics by FinleySalern (1.6k 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 Lourdes26529 (2.1k points)

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1 answer 49 views

Calculate the pH of a 0.1 M solution of hydrochloric acid (HCl) assuming complete dissociation of the acid in water, and identify if the solution is acidic, basic or neutral.

asked Feb 3 in Inorganic Chemistry by EmilySulman6 (2.0k points)

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Calculate the standard electrode potential for the redox reaction: Al(s) + Fe2+(aq) → Fe(s) + Al3+(aq) at 298K, given that the standard reduction potential for Fe2+/Fe is -0.44V and Al3+/Al is -1.66V.

asked Feb 3 in Chemical thermodynamics by MargueriteSa (2.1k points)

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Calculate the surface tension of a liquid whose weight is 0.1 N and the length of a wire that floats on the surface of the liquid is 20 cm. The density of the liquid is 1.2 g/cm³.

asked Feb 3 in Surface Chemistry by MaribelLeepe (1.7k points)

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Calculate the standard enthalpy change for the reaction in which 50 mL of 1.0 M HCl(aq) is added to 50 mL of 1.0 M NaOH(aq) at 25°C, given that the solution's specific heat capacity is 4.18 J g⁻¹ K⁻¹ and the density is 1.00 g/mL.

asked Feb 3 in Chemical thermodynamics by BradlySyr093 (1.8k points)

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