Answers by TheScientist

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What is the enthalpy change for the combustion of methane gas (CH4) under standard conditions, given that the enthalpies of formation for CH4 and CO2 are -74.81 kJ/mol and -393.51 kJ/mol respectively?

answered Mar 1 in Chemical reactions

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What is the enthalpy change when 2.5 moles of methane are burned completely in excess oxygen gas, given that the enthalpy of combustion of methane is -890 kJ/mol?

answered Mar 1 in ThermoChemistry

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What is the enthalpy change when 1.50 moles of methane (CH4) is burned in excess oxygen gas (O2) under standard conditions, if the combustion reaction releases 890.4 kJ of heat? (Assuming all reactants and products are in their standard states)

answered Mar 1 in Physical Chemistry

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What is the enthalpy change for the combustion of 1 mole of methane (CH4) at constant pressure if the standard enthalpy of formation of methane is -74.8 kJ/mol? Write a balanced equation for the combustion reaction and show your calculations.

answered Mar 1 in ThermoChemistry

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What is the enthalpy change for the combustion of 1 mole of methane gas (CH4) at standard conditions, given that the enthalpies of formation for methane, carbon dioxide, and water are -74.8 kJ/mol, -393.5 kJ/mol, and -285.8 kJ/mol, respectively?

answered Mar 1 in ThermoChemistry

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What is the enthalpy change for the reaction of burning 1 mole of methane gas (CH4) at standard conditions (25°C and 1 atm)?

answered Mar 1 in ThermoChemistry

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What is the enthalpy change for the combustion of 1 mole of methane gas (CH4) at standard conditions, given the following information: ΔHf(CH4) = -74.8 kJ/mol, ΔHf(H2O) = -285.8 kJ/mol and ΔHf(CO2) = -393.5 kJ/mol?

answered Mar 1 in Chemical reactions

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What is the enthalpy change for the combustion of 1 mole of butane (C₄H₁₀) gas (g) under standard conditions?

answered Mar 1 in Chemical thermodynamics

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What is the enthalpy change for dissolving 10 grams of sodium chloride (NaCl) in 100 mL of water at 25°C? The heat capacity of water is 4.18 J/(g·°C) and the enthalpy of formation of NaCl is -411.1 kJ/mol.

answered Mar 1 in ThermoChemistry

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What is the enthalpy change for dissolving 10 grams of potassium chloride in 100 mL of water at 25°C if the resulting solution has a concentration of 0.5 M?

answered Mar 1 in ThermoChemistry

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What is the enthalpy change for dissolving 10 grams of sodium chloride (NaCl) in 200 mL of water at 25°C if the final temperature of the solution is 30°C? Given: the enthalpy of solution for NaCl is -3.9 kJ/mol.

answered Mar 1 in ThermoChemistry

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What is the enthalpy change associated with the fusion of 45.0 g of ice at 0°C? Given the enthalpy of fusion for water is 6.01 kJ/mol.

answered Mar 1 in ThermoChemistry

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What is the enthalpy change for the combustion of 1 mole of propane (C3H8) given the enthalpies of formation of CO2, H2O, and C3H8? C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(g) ΔH° = ?

answered Mar 1 in ThermoChemistry

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What is the enthalpy change for the following chemical reaction?2H2 (g) + O2 (g) → 2H2O (l)Given the enthalpy of formation values:ΔHf°(H2O) = -285.8 kJ/molΔHf°(H2) = 0 kJ/molΔHf°(O2) = 0 kJ/mol

answered Mar 1 in Chemical thermodynamics

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What is the enthalpy change involved in the isomerization reaction of hexene from trans-hexene to cis-hexene? Given the standard enthalpy of formation values for trans-hexene and cis-hexene are -123 kJ/mol and -130 kJ/mol respectively.

answered Mar 1 in ThermoChemistry

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What is the enthalpy change for the isomerization of butene-1 to butene-2 at standard conditions, given the enthalpies of formation of butene-1, butene-2, and hydrogen gas?

answered Mar 1 in ThermoChemistry

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What is the enthalpy change for the hydrolysis of one mole of sucrose (C12H22O11) to glucose (C6H12O6) and fructose (C6H12O6), given the standard enthalpies of formation for sucrose, glucose, and fructose?

answered Mar 1 in ThermoChemistry

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What is the enthalpy change (ΔH) for the combustion of methane gas (CH4) at constant pressure (1 atm) if 5.5 grams of methane is completely burned in a bomb calorimeter and the temperature increases by 14.6°C?

answered Mar 1 in Physical Chemistry

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What is the enthalpy change (∆H) for the combustion of 5.00 grams of propane (C3H8) given the following balanced chemical equation: C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(g) and the heat of formation values for each compound involved?

answered Mar 1 in Chemical reactions

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How can we calculate the energy states and optical properties of a semiconductor quantum dot with a 6 nm diameter and a spherical shape using quantum chemistry methods?

answered Mar 1 in Quantum Chemistry

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