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What is the enthalpy change for the reaction:2H2(g) + O2(g) → 2H2O(l)Given the following bond enthalpy values: H-H bond = +436 kJ/mol O=O bond = +495 kJ/mol H-O bond = -463 kJ/molExpress your answer in kJ/mol.

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the enthalpy change for the reaction: 2H2(g) + O2(g) → 2H2O(l) Given that the standard enthalpy of formation for H2O(l) is -285.8 kJ/mol, and the standard enthalpy of formation for H2(g) and O2(g) are 0 kJ/mol.

asked Mar 1 in Chemical thermodynamics by TheScientist (138k points)

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What is the enthalpy change in kilojoules for the reaction:2H2(g) + O2(g) → 2H2O(l)given that the standard enthalpy of formation for liquid water is -285.8 kJ/mol, and the standard enthalpy of formation for hydrogen gas and oxygen gas are 0 kJ/mol?

asked Mar 1 in Chemical thermodynamics by TheScientist (138k points)

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What is the enthalpy change for the reaction when 2 moles of hydrogen gas react with 1 mole of oxygen gas to form 2 moles of water vapor? (Hint: Use the balanced chemical equation and standard enthalpies of formation for each compound involved.)

asked Mar 1 in Chemical reactions by TheScientist (138k points)

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What is the enthalpy change for the reaction 2CuO(s) + C(s) → 2Cu(s) + CO2(g) if the enthalpy of formation for CuO(s) is -159.2 kJ/mol, the enthalpy of formation for CO2(g) is -393.5 kJ/mol, and the standard enthalpy of formation for Cu(s) is 0?

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the enthalpy change for the isomerization of butene-1 to butene-2, given that the standard enthalpy of formation for butene-1 and butene-2 are -123 kJ/mol and -131 kJ/mol respectively?

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the enthalpy change for the isomerization of 2-butene to 1-butene at constant pressure, given that the standard enthalpy of formation of 2-butene is -118.0 kJ/mol and the standard enthalpy of formation of 1-butene is -133.9 kJ/mol?

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the enthalpy change for the ionization of a 1 mol/L solution of hydrochloric acid (HCl) at 25 °C, given that the pH of the solution is 1.5?

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the enthalpy change for the hydrolysis reaction of sucrose (C12H22O11) in water, given that the molar heat of combustion for sucrose is -5632 kJ/mol and the standard enthalpy of formation for liquid water is -285.83 kJ/mol?

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the enthalpy change for the hydrolysis of 10 grams of sucrose (C12H22O11) in an aqueous solution, assuming complete reaction and a standard state, given that the enthalpy of hydrolysis of sucrose is -564.9 kJ/mol?

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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Sure! Here's a question:Calculate the enthalpy change for the following chemical reaction: 2H2 (g) + O2 (g) → 2H2O (l) Given the following enthalpy changes: 2H2 (g) + O2 (g) → 2H2O (g) ΔH = -483.6 kJ/mol 2H2O (g) → 2H2O (l) ΔH = -40.7 kJ/mol

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the enthalpy change for the dissolution of 5 grams of solid NaOH in 100 mL of water, given that the final temperature of the solution is 25°C? The heat capacity of the solution is 4.18 J/g°C.

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the enthalpy change for the dissolution of 4.5 grams of NaOH in water, given that the molar enthalpy of dissolution is -44.5 kJ/mol?

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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Sure! Here is a question for the student to solve:What is the enthalpy change for the dissolution of 10 grams of potassium nitrate (KNO3) in 100 grams of water at 25°C? Given the molar enthalpy of dissolution for KNO3 to be -34.01 kJ/mol.

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the enthalpy change for the dissolution of 10 grams of NaCl in 100 mL of water at 25°C given that the enthalpy of solution of NaCl is -3.9 kJ/mol?

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the enthalpy change for the complete combustion of 2 moles of propane (C3H8) in the presence of excess oxygen gas (O2)?

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the enthalpy change for the combustion of propane?

asked Mar 1 in Chemical thermodynamics by TheScientist (138k points)

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Sure! Here's a precise problem for the student:The combustion of 2.50 grams of methane (CH4) gave off 119.1 kJ of heat. Calculate the enthalpy change for the combustion of one mole of methane at constant pressure.

asked Mar 1 in Chemical reactions by TheScientist (138k points)

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What is the enthalpy change for the combustion of one mole of methane (CH4) gas to form carbon dioxide (CO2) gas and water (H2O) vapor at standard temperature and pressure (STP)?

asked Mar 1 in Chemical reactions by TheScientist (138k points)

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What is the enthalpy change for the combustion of methane gas in a bomb calorimeter?

asked Mar 1 in Physical Chemistry by TheScientist (138k points)

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