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Calculate the enthalpy change of the polymerization reaction of ethylene, given that the heat of combustion of ethylene is -1411 kJ/mol and the enthalpy of formation of ethylene is +52.3 kJ/mol. The balanced equation for the polymerization of ethylene is:nC2H4 -> [-C2H4-]nAssume complete polymerization and that the standard enthalpy of formation of the polymer is negligible.

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

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Calculate the enthalpy change of the polymerization reaction of ethylene, given that the enthalpy of combustion of ethylene is -1411.1 kJ/mol and that the polymerization of ethylene releases 3.4 kJ/mol.

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

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Calculate the enthalpy change of the polymerization of styrene using the following information: Reactants: - Styrene: C8H8 (l) - Peroxide initiator: C6H5OOC(CH3)3 (l) Products: - Polystyrene: (C8H8)n (s)- Byproduct: CO2 (g)Given information: - Heat of formation of CO2 (g) = -393.5 kJ/mol - Mass of styrene used = 50 g - Molarity of the initiator solution = 0.3 M - Volume of the initiator solution used = 25 mL - Density of the initiator solution = 0.89 g/mL - The reaction is carried out at a constant pressure of 1 atm and a temperature of 25°C.

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

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Calculate the enthalpy change of the isomerization of but-2-ene to 2-methylpropene given the standard enthalpy of formation of but-2-ene is -20.4 kJ/mol and that of 2-methylpropene is -27.0 kJ/mol. The reaction is carried out at constant pressure and 298 K.

asked Jan 23 in ThermoChemistry by HildredU3922 (1.9k points)

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Calculate the enthalpy change of the following reaction: 2C(s) + 2H2(g) + 5O2(g) -> 2CO2(g) + 2H2O(l) Given the enthalpies of formation of CO2(g), H2O(l), and H2(g) are -393.5 kJ/mol, -285.8 kJ/mol, and -241.8 kJ/mol, respectively.

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

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Calculate the enthalpy change of the dissolution of 5 grams of sodium hydroxide (NaOH) in 100 mL of water, given the molar enthalpy of dissolution of NaOH to be -44 kilojoules per mole.

asked Jan 23 in ThermoChemistry by BrigetteCors (2.5k points)

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Calculate the enthalpy change of solution for 5.00 g of ammonium chloride (NH4Cl) dissolved in 50.0 mL of water, given that the temperature of the solution decreases by 4.21°C. The density of water is 1.00 g/mL and the specific heat capacity of the solution is 4.18 J/g°C. The molar mass of ammonium chloride is 53.49 g/mol.

asked Jan 23 in ThermoChemistry by Miguel37A006 (2.3k points)

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Calculate the enthalpy change of solution for 2.0 moles of sodium chloride in 500.0 mL of water at 25°C. The molar heat of solution of sodium chloride is -3.91 kJ/mol.

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

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Calculate the enthalpy change of reduction for Fe2O3 using the following data:Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g) ΔH°rxn = -26.8 kJ mol^-1Fe2O3(s) + 2Al(s) → Al2O3(s) + 2Fe(l) ΔH°rxn = +824.2 kJ mol^-1Note: The standard enthalpy of formation for CO2(g) is -393.5 kJ mol^-1 and for Al2O3(s) is -1675.7 kJ mol^-1.

asked Jan 23 in ThermoChemistry by SGDJenifer99 (2.0k points)

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Calculate the enthalpy change of precipitation when 50 ml of 0.1 M silver nitrate (AgNO3) is added to 50 ml of 0.1 M sodium chloride (NaCl) solution. The temperature of the mixture increases by 5.0 °C. Given the specific heat capacity of the solution is 4.18 J/g °C and the density of the solution is 1.0 g/mL.

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

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Calculate the enthalpy change of precipitation when 50 mL of 0.1 M calcium chloride solution is mixed with 50 mL of 0.1 M silver nitrate solution, assuming that the reaction goes to completion and the temperature remains constant at 25°C.

asked Jan 23 in ThermoChemistry by AudraNowlin6 (2.2k points)

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Calculate the enthalpy change of polymerization for the formation of polystyrene from its monomer, styrene, given the following data:- ΔH°f (Styrene) = -25.68 kJ/mol- Bond enthalpies: C-C = 347 kJ/mol; C=C = 611 kJ/mol; C-H = 413 kJ/mol

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

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Calculate the enthalpy change of oxidation for the combustion of 1 mole of ethane gas (C₂H₆) in oxygen gas (O₂) to form carbon dioxide gas (CO₂) and water vapor (H₂O), given the following enthalpies of formation: ΔHf(C₂H₆) = -84.7 kJ/mol, ΔHf(CO₂) = -393.5 kJ/mol, ΔHf(H₂O) = -241.8 kJ/mol.

asked Jan 23 in ThermoChemistry by Anglea937174 (1.9k points)

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1 answer 69 views

Calculate the enthalpy change of mixing 50 mL of 1 M HCl with 50 mL of 1 M NaOH at 25°C. It is known that the standard enthalpies of formation of HCl and NaOH are -92.3 kJ/mol and -469.2 kJ/mol, respectively. Assume that the heat capacity of the mixture is 4.18 J/g°C and the density of the solution is 1 g/mL.

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

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Calculate the enthalpy change of isomerization for the reaction of cyclopropane to propene given that the standard enthalpy of formation of cyclopropane is -119.1 kJ/mol and the standard enthalpy of formation of propene is -103.8 kJ/mol. Assume that the enthalpy change of vaporization for both compounds is negligible.

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

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Calculate the enthalpy change of isomerization for the conversion of n-butane to isobutane if the heat of combustion of n-butane is -2657.5 kJ/mol and the heat of combustion of isobutane is -2878.8 kJ/mol.

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

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Calculate the enthalpy change of isomerization for the conversion of cis-but-2-ene to trans-but-2-ene, given the standard enthalpy of formation for both isomers. Asssume all other conditions remain constant.

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

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Calculate the enthalpy change of isomerization for the conversion of cis-but-2-ene to trans-but-2-ene if the enthalpy of formation of cis-but-2-ene is -24.7 kJ/mol and the enthalpy of formation of trans-but-2-ene is -28.6 kJ/mol. The heat of combustion of but-2-ene is -2723 kJ/mol.

asked Jan 23 in ThermoChemistry by EttaKee54894 (2.1k points)

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1 answer 72 views

Calculate the enthalpy change of isomerization for the conversion of cis-2-butene to trans-2-butene, given that the heat of combustion of cis-2-butene is -3283.1 kJ/mol and the heat of combustion of trans-2-butene is -3336.8 kJ/mol. Assume that the heat of combustion is representative of the enthalpy of formation.

asked Jan 23 in ThermoChemistry by NFDRoman4328 (1.8k points)

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1 answer 77 views

Calculate the enthalpy change of ionization for magnesium given the following data: Mg(g) → Mg+(g) + e- ΔH1 = +738 kJ/mol Mg+(g) → Mg2+(g) + e- ΔH2 = +1451 kJ/mol

asked Jan 23 in ThermoChemistry by Georgianna69 (2.2k points)

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