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Calculate the bond length between two carbon atoms in a molecule of ethane, given that the bond energy is 347 kJ/mol and the force constant is 667 N/m.

asked Jan 23 in Chemical bonding by DemetriusCha (1.7k points)

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Calculate the Gibbs free energy change (ΔG) for the following chemical reaction at 25°C and constant pressure of 1 atm:2H2(g) + O2(g) → 2H2O(l)Given the following standard Gibbs free energy of formation values (ΔfG°) at 25°C:H2(g) = 0 kJ/molO2(g) = 0 kJ/molH2O(l) = -237 kJ/mol

asked Jan 23 in Chemical thermodynamics by KraigHogue46 (1.8k points)

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Calculate the enthalpy change for the reaction below using Hess's Law: 2CO(g) + O2(g) -> 2CO2(g), delta H = -566 kJ/mol Given the following reactions and their corresponding enthalpy changes: CO(g) + 1/2O2(g) -> CO2(g), delta H = -283 kJ/molC(s) + O2(g) -> CO2(g), delta H = -393.5 kJ/mol

asked Jan 23 in ThermoChemistry by HalinaAlderm (1.9k points)

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1 answer 65 views

Calculate the amount of heat energy required to melt 25 grams of ice at 0°C, given that the enthalpy of fusion of ice is 6.01 kJ/mol.

asked Jan 23 in ThermoChemistry by IsabellFrome (2.1k points)

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Calculate the formal charge on each atom in SO4 2- ion.

asked Jan 23 in Inorganic Chemistry by TroyWitcher8 (2.1k points)

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Calculate the entropy change (ΔS) for the reaction below at 298 K:2H2(g) + O2(g) → 2H2O(l)Given the standard molar entropy values are:H2(g) = 130.68 J/K molO2(g) = 205.03 J/K molH2O(l) = 69.91 J/K mol

asked Jan 23 in Chemical thermodynamics by ChasityBelli (2.2k points)

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1 answer 63 views

Calculate the bond dissociation energy (in kJ/mol) required to break the carbon-hydrogen bond in methane using the given bond dissociation energies: C-H = 413 kJ/mol, C-C = 347 kJ/mol, C=C = 602 kJ/mol, H-H = 436 kJ/mol.

asked Jan 23 in ThermoChemistry by GabrielCantu (1.6k points)

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1 answer 61 views

Calculate the corrosion potential of a nickel metal electrode in a 0.1 M NaCl solution with a pH of 7.2, given that the standard electrode potential for the Ni2+/Ni redox reaction is -0.25 V vs. the standard hydrogen electrode.

asked Jan 23 in ElectroChemistry by Annett65L392 (2.1k points)

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1 answer 47 views

Calculate the heat of crystallization (in kJ/mol) of NaOH if 25g of NaOH dissolves in 100g of water at 25°C and releases 4.75kJ of heat.

asked Jan 23 in ThermoChemistry by LouellaComo (1.5k points)

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Calculate the entropy change (∆S) for the reaction between 2.0 moles of hydrogen gas (H2) and 1.0 mole of oxygen gas (O2) at constant pressure and a temperature of 298 K, given the standard molar entropy values for H2 and O2 to be 130.7 J/K•mol and 205.0 J/K•mol, respectively.

asked Jan 23 in ThermoChemistry by RoderickKyle (2.4k points)

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1 answer 60 views

Calculate the enthalpy change (ΔH) for the isomerization of butene-1 to butene-2, given that the heat of combustion of butene-1 and butene-2 are -2657.7 kJ/mol and -2674.4 kJ/mol, respectively.

asked Jan 23 in ThermoChemistry by LeifLeverett (2.3k points)

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1 answer 101 views

A chemistry student needs to determine the major product(s) formed from the reaction between 1-bromo-3-methylcyclohexane and sodium ethoxide in ethanol solvent with a heat source. What are the major products formed and explain the mechanism of the reaction?

asked Jan 22 in Organic Chemistry by MargueriteSl (1.9k points)

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Calculate the enthalpy of desorption for water vapor adsorbed on activated carbon, given that the heat of adsorption is -50 kJ/mol and the boiling point of water is 100°C.

asked Jan 23 in ThermoChemistry by OrvalFrankla (1.9k points)

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Calculate the enthalpy change (in kJ/mol) for the ionization of magnesium, given that the first ionization energy of magnesium is 738 kJ/mol and the second ionization energy is 1450 kJ/mol.

asked Jan 23 in ThermoChemistry by RamiroShockl (2.3k points)

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Calculate the enthalpy change (in kJ/mol) for the chemical reaction: C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(l) Given the standard enthalpies of formation (ΔHf°) for C2H5OH(l) = -277.6 kJ/mol, CO2(g) = -393.5 kJ/mol, and H2O(l) = -285.8 kJ/mol.

asked Jan 23 in Chemical thermodynamics by JodieBaskett (1.8k points)

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1 answer 61 views

Calculate the corrosion current density of a stainless steel electrode in a 0.5 M HCl solution at 25 degrees Celsius, given that the polarization resistance of the electrode is 200 ohms and the corrosion potential is -0.3 V vs. the standard hydrogen electrode (SHE).

asked Jan 23 in ElectroChemistry by RandolphWvo (1.9k points)

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1 answer 61 views

Calculate the corrosion current density of a metal M in a 0.5 M H2SO4 solution with a pH of 2.5, where the half-cell potential of the metal M is -0.8V and the standard hydrogen electrode potential is 0V. The temperature of the solution is 25°C and the density of the metal is 7.85 g/cm³.

asked Jan 23 in ElectroChemistry by PeteWirtz263 (2.1k points)

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1 answer 62 views

Calculate the bond order and bond length of the carbon-nitrogen triple bond in cyanide ion (CN^-) using valence bond theory and molecular orbital theory.

asked Jan 23 in Inorganic Chemistry by JonasQuj2910 (2.1k points)

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1 answer 57 views

Calculate the enthalpy change for the hydrolysis of sucrose given that 10.0 g of sucrose was completely hydrolyzed in excess water. The reaction takes place at 25°C and 1 atm pressure. The following reaction is involved: C12H22O11(s) + H2O(l) → 12C(s) + 11H2O(l) The enthalpy of formation of C12H22O11(s) is -2226.8 kJ/mol and the enthalpy of formation of H2O(l) is -285.8 kJ/mol.

asked Jan 23 in ThermoChemistry by ShaunteYun90 (1.4k points)

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Calculate the bond length between two hydrogen atoms that are covalently bonded together. Given: the electronegativity value of hydrogen is 2.1 and the bond energy is 436 kJ/mol. Hint: Use the formula =0.74(∘+∘) where ∘ is the covalent radius of hydrogen.

asked Jan 23 in Chemical bonding by ClemmieBalfe (2.4k points)

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