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What is the enthalpy change for the reaction: 2H2(g) + O2(g) → 2H2O(g), given that the bond enthalpy of H-H, O=O, and H-O are 436 kJ/mol, 498 kJ/mol, and 464 kJ/mol, respectively?

asked Mar 1 in Chemical reactions 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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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 (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?

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

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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?

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

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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?

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

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What is the amount of energy required to break the carbon-hydrogen bond in a methane molecule (CH4) if the bond dissociation energy (BDE) of C-H is 413 kJ/mol?

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

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What is the change in enthalpy (ΔH) for the combustion of 10 grams of methane (CH4) at standard conditions, given the following balanced equation: CH4 + 2O2 → CO2 + 2H2O?

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

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Sure, here's a question for you to solve:Calculate the bond energy required to break the H-O bond in water (H2O). Given that the bond energy of the H-H bond is 436 kJ/mol and O=O bond is 495 kJ/mol.

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

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What is the bond energy required to break the bond between two nitrogen atoms (N2) if the bond length is 109.76 pm?

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

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What is the bond energy (in kJ/mol) required to break apart a single molecule of methane (CH4) into its individual atoms (C and 4H)?

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

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What is the bond energy of O-H bond in the water molecule (H2O)? Show the complete calculation with the given bond dissociation energy of H-O bond and H-H bond.

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

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What is the bond energy (in kJ/mol) of the covalent bond between the carbon and oxygen atoms in carbon dioxide (CO2), given that the bond length is 116.3 pm?

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

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What is the activation energy of the following chemical reaction: 2H2O2(aq) → 2H2O(l) + O2(g)? Use the experimental data provided to calculate the activation energy in Joules per mole.

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

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What is the activation energy in Joules for a chemical reaction that has a rate constant of 2.7 x 10^-3 s^-1 and a temperature of 298 K? The activation energy can be calculated using the Arrhenius equation.

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

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What is the activation energy of the reaction between hydrochloric acid and zinc, given that the reaction rate constant at 25°C is 3.42 x 10^-3 s^-1 and the temperature coefficient is 1.99?

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

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What is the activation energy required for the chemical reaction between hydrogen gas and oxygen gas to form water? Given that the rate constant of the reaction is 5.62 x 10^-4 s^-1 at 298 K and the reaction has an overall order of 2.

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

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What is the activation energy required for the decomposition of hydrogen peroxide to water and oxygen at 25°C, given the rate constant of the reaction is 0.005 s⁻¹?

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

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What is the activation energy for a chemical reaction that has a rate constant of 2.5 × 10^-3 s^-1 at a temperature of 298 K, when the frequency factor is 5 × 10^13 s^-1?

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

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