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Calculate the corrosion rate of a 5mm thick copper wire that is exposed to a saline solution of 20% NaCl at a temperature of 25°C, knowing that the wire has lost 3 grams of mass in 10 days of exposure.

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

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Calculate the enthalpy change for the polymerization of propylene to polypropylene, given the enthalpy of formation of propylene is -103.8 kJ/mol and the enthalpy of formation of polypropylene is -45.4 kJ/mol. Assume the reaction occurs at constant pressure and temperature.

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

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Calculate the bond dissociation energy of the carbon-hydrogen bond in methane (CH4) given that the bond enthalpy of C-H bond is 413 kJ/mol.

asked Jan 23 in Chemical bonding by UnaHolt18437 (1.7k points)

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Calculate the enthalpy change for the combustion of methane gas (CH4) at standard conditions using the given relevant thermodynamic data:2H2(g) + O2(g) -> 2H2O(g); ΔH° = -483.7 kJ/molCH4(g) + 2O2(g) -> CO2(g) + 2H2O(g); ΔH° = ?

asked Jan 23 in Chemical thermodynamics by BradyBassett (2.0k points)

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Calculate the corrosion potential of copper in a galvanic couple with a standard hydrogen electrode at 298 K, given that the standard electrode potential of copper is +0.34 V and the standard electrode potential of hydrogen is 0 V.

asked Jan 23 in ElectroChemistry by LarhondaKeel (1.6k points)

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Calculate the amount of energy required to melt 50 grams of ice at 0°C, given the enthalpy of fusion for water is 6.01 kJ/mol.

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

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Calculate the amount of energy in Joules required to melt 15 grams of ice at 0°C, given that the heat of fusion of water is 334 J/g.

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

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Calculate the bond order and bond length of the nitrogen-oxygen bond in nitrous oxide (N2O).

asked Jan 23 in Inorganic Chemistry by NicholasPedi (1.8k points)

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Calculate the enthalpy change (ΔH) for the dissolution of 10 grams of NaOH in 100 mL of water, given that the final temperature after mixing is 28°C and the initial temperature of water was 25°C. The specific heat capacity of water is 4.18 J/g°C. The molar mass of NaOH is 40.00 g/mol and the enthalpy of dissolution for NaOH is -44.51 kJ/mol.

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

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1 answer 54 views

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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Calculate the enthalpy change (in kJ/mol) for the polymerization of ethylene to polyethylene, given that the polymerization of 1 mole of ethylene produces 3 moles of polyethylene and the enthalpy change of the reaction is -32 kJ/mol.

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

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1 answer 60 views

Calculate the bond order and bond length of the nitric oxide molecule (NO).

asked Jan 23 in Inorganic Chemistry by VictorinaWoz (1.9k points)

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Calculate the enthalpy change for the hydrolysis of 50 grams of sucrose (C12H22O11) when dissolved in 500 ml of water at 25°C. The molar mass of sucrose is 342.3 g/mol and the enthalpy change per mole of sucrose is -564.8 kJ/mol.

asked Jan 23 in ThermoChemistry by Marlene31P52 (2.5k points)

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Calculate the bond length between two hydrogen atoms that form a H2 molecule given that the bond energy is 436 kJ/mol and the force constant is 434 N/m.

asked Jan 23 in Chemical bonding by FelicitasVas (2.1k points)

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Calculate the change in internal energy of a system that releases 350 J of heat to the surroundings and does 200 J of work on its surroundings?

asked Jan 23 in Physical Chemistry by KyleSchlemme (2.1k points)

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1 answer 63 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 53 views

Calculate the enthalpy of adsorption of benzene vapor on silica gel at 25°C and a pressure of 2.0 atm, given that the mass of adsorbent used is 0.25 g and the adsorption capacity of silica gel for benzene at this temperature and pressure is 0.75 g/g.

asked Jan 23 in ThermoChemistry by Latonya89F54 (2.2k points)

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1 answer 58 views

Calculate the electronegativity difference between chlorine (Cl) and sodium (Na) atoms, and determine the type of bond that would form between them.

asked Jan 23 in Chemical bonding by KristeenBras (2.0k points)

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1 answer 55 views

Calculate the enthalpy change for the hydrolysis of 2 moles of magnesium bromide, MgBr2, in water, given that the standard enthalpy change of formation of magnesium oxide, MgO, is -601.6 kJ/mol and the standard enthalpy change of formation of hydrogen bromide, HBr, is -36.3 kJ/mol.

asked Jan 23 in ThermoChemistry by EmilyUtley95 (1.9k points)

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1 answer 92 views

A student conducted an electrolysis experiment using a current of 2 amperes for 30 minutes with a copper sulfate solution. What is the mass of copper deposited on the cathode? The atomic weight of copper is 63.546 g/mol and the Faraday constant is 96,485 C/mol.

asked Jan 22 in ElectroChemistry by TawnyaI60415 (1.4k points)

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