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Calculate the bond dissociation energy (in kJ/mol) of chlorine gas (Cl2) if it requires 243 kJ of energy to break a single Cl-Cl bond in the gas phase.

asked Jan 23 in ThermoChemistry by AlineBacon1 (1.5k points)

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1 answer 77 views

Calculate the enthalpy change for the isomerization of n-butane to iso-butane if the standard enthalpy of formation for n-butane is -125.7 kJ/mol and that for iso-butane is -147.4 kJ/mol. The isomerization reaction occurs at a constant pressure of 1 atm and at a temperature of 298 K.

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

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1 answer 121 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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1 answer 75 views

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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1 answer 75 views

Calculate the enthalpy of combustion of methane if 2.56 g of methane was burnt completely in a bomb calorimeter containing excess oxygen, causing a temperature rise of 4.58 °C in the calorimeter, which has a heat capacity of 1.26 kJ/°C. The balanced chemical equation for the combustion of methane is as follows: CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) + energy.

asked Jan 23 in ThermoChemistry by MaxwellDuff3 (1.9k points)

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1 answer 73 views

Calculate the enthalpy of polymerization for the synthesis of polyethylene from its monomer using the given data:- Standard enthalpy of formation of ethylene (C2H4) = +52.3 kJ/mol- Standard enthalpy of formation of polyethylene (-[-CH2-]n-) = -256 kJ/mol

asked Jan 23 in ThermoChemistry by TorySelwyn2 (2.1k points)

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1 answer 113 views

A student needs to determine the standard electrode potential for the following reaction: Fe3+ + e- → Fe2+ Using the standard electrode potentials of Fe3+/Fe2+ and Ag+/Ag, calculate the standard cell potential for the following reaction: 2Ag+ (aq) + Fe(s) → 2Ag(s) + Fe2+ (aq) Determine if this reaction is spontaneous or nonspontaneous under standard conditions.

asked Jan 22 in ElectroChemistry by GeraldoPatte (1.7k points)

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1 answer 121 views

A chemistry student needs to determine the enthalpy change for the reaction of nitrogen gas reacting with hydrogen gas to form ammonia gas, given that they have the following information:N2(g) + 3H2(g) --> 2NH3(g) ΔH1 = -92.4 kJ/mol2H2(g) + O2(g) --> 2H2O(l) ΔH2 = -572.0 kJ/molN2(g) + O2(g) --> 2NO(g) ΔH3 = +180.6 kJ/molUse Hess's law to calculate the enthalpy change for the reaction:2NH3(g) + 5O2(g) --> 2HNO3(aq) + 2H2O(l)

asked Jan 22 in Chemical reactions by YvetteLink0 (2.0k points)

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1 answer 122 views

A chemistry student is required to calculate the activation energy of a chemical reaction. Given the rate constant of a reaction at two different temperatures, what is the activation energy?

asked Jan 22 in Chemical reactions by RenateCremor (1.9k points)

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1 answer 80 views

Calculate the energy required to break all the bonds in 1 mole of methane gas (CH4) at standard conditions, given that the bond energies of C-H and C-C bonds are 413 kJ/mol and 348 kJ/mol, respectively. Then, calculate the total energy released or absorbed during the combustion of 1 mole of methane gas with oxygen gas to form carbon dioxide gas and water vapor.

asked Jan 23 in Chemical reactions by MindyR870320 (1.6k points)

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1 answer 82 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 66 views

Calculate the heat of mixing when 100 mL of 1.0 M HCl is mixed with 100 mL of 1.0 M NaOH at 25°C. The specific heat of the resulting solution is 4.18 J/g°C and the final temperature of the solution is 30°C. Assume the heat capacities of HCl, NaOH, and water are negligible.

asked Jan 23 in ThermoChemistry by EloiseLoxton (1.7k points)

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1 answer 80 views

Calculate the electronic energy levels and absorption spectra of a quantum dot composed of CdSe with a diameter of 5 nanometers and compare it to a quantum well with the same dimensions. Which structure would have a higher bandgap energy and why?

asked Jan 23 in Quantum Chemistry by JosetteSarto (2.0k points)

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1 answer 76 views

Calculate the enthalpy change of combustion for ethane (C2H6) given that the standard enthalpy of formation for ethane is -84.68 kJ/mol, the standard enthalpy of formation for CO2 is -393.5 kJ/mol, and the standard enthalpy of formation for H2O is -241.8 kJ/mol.

asked Jan 23 in ThermoChemistry by StantonPearl (1.8k points)

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1 answer 83 views

Calculate the anodic Tafel slope (in mV/decade) for the corrosion of iron in a solution containing 0.1 M HCl, given that the corrosion current density is 2.5 mA/cm2 and the exchange current density is 0.25 mA/cm2. Assume T = 25°C and the activation energy of the reaction is 40 kJ/mol.

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

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1 answer 85 views

Based on our study of Monte Carlo simulations of phase transitions in computational chemistry, calculate the probability of a solid to liquid phase transition at a given temperature for a certain substance using Monte Carlo simulation techniques.

asked Jan 23 in Computational Chemistry by LouiePartrid (1.8k points)

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1 answer 121 views

A chemistry student needs to determine the direction in which equilibrium will shift when the concentration of reactants in a reversible reaction is changed using Le Chatelier's principle. Given the reaction equation: 2SO2(g) + O2(g) ⇄ 2SO3(g), if the concentration of SO2 is increased, will the reaction shift to the left or right?

asked Jan 22 in Chemical reactions by YOKIva496594 (2.6k points)

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1 answer 73 views

Calculate the enthalpy of ionization of magnesium if 4.8 g of magnesium reacts completely with hydrochloric acid to form 224 mL of hydrogen gas at standard temperature and pressure (STP). The heat released during the reaction is -412 kJ/mol.

asked Jan 23 in ThermoChemistry by AudreaV25265 (2.0k points)

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1 answer 76 views

Calculate the enthalpy change in kJ/mol for the combustion of butane (C4H10) given that the heat of formation of CO2(g) is -393.5 kJ/mol, the heat of formation of H2O(l) is -285.8 kJ/mol, and the heat of formation of C4H10(g) is -126 kJ/mol. The balanced equation for the combustion of butane is:2C4H10(g) + 13O2(g) → 8CO2(g) + 10H2O(l) + heat.

asked Jan 23 in ThermoChemistry by SelmaHartsoc (1.8k points)

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1 answer 80 views

Calculate the electronegativity difference between a hydrogen atom (H) and a chlorine atom (Cl) in the molecule HCl.

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

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