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What is the enthalpy change, in kilojoules per mole, when 6.0 grams of potassium chloride (KCl) is dissolved in 200.0 mL of water at 25°C? The molar heat of dissolution of KCl is -57.3 kJ/mol.

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

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What is the enthalpy change when calcium chloride dihydrate (CaCl2•2H2O) is heated to release its water of hydration, given that the enthalpy of formation of CaCl2 is -795.8 kJ/mol and the heat capacity of CaCl2•2H2O is 155.09 J/(mol K)?

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

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What is the enthalpy change when 50 grams of potassium chloride (KCl) dissolve in 200 ml of water at a temperature of 25°C? The molar enthalpy of dissolution of KCl is -17.8 kJ/mol.

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

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What is the enthalpy change when 50 g of NaOH is dissolved in 500 mL of water at 25°C? Consider the density and specific heat capacity of water, and use the standard enthalpy of formation values for NaOH and H2O.

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

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What is the enthalpy change of the dissolution of 5.00 g of sodium chloride in 100.0 mL of water at 25°C, given that the final temperature of the solution is 28.6°C and 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 of precipitation when 50 mL of 0.1 M BaCl2 is mixed with 25 mL of 0.2 M Na2SO4, given that ΔH˚f of BaSO4 is -1464 kJ/mol?

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

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What is the enthalpy change of isomerization of butene-1 to cis-butene-2 at 25°C and 1 atm? Given that the molar enthalpy of combustion of butene-1 is -2657 kJ/mol and the molar enthalpy of combustion of cis-butene-2 is -2670 kJ/mol.

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

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What is the enthalpy change of isomerization for butene-1 to butene-2 given the following information:- The standard enthalpy of formation for butene-1 is -24.7 kJ/mol- The standard enthalpy of formation for butene-2 is -25.8 kJ/mol

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

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What is the enthalpy change of ionization for a solution containing 0.1 mol of HCl (aq) if 20 kJ of heat is absorbed during the ionization process?

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

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What is the enthalpy change of hydrolysis for 10 grams of sucrose (C12H22O11) dissolved in 100 mL of water at 25°C? Given that the enthalpy of hydrolysis for sucrose is -564.8 kJ/mol.

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

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What is the enthalpy change of dissolving 10 grams of sodium chloride (NaCl) in 100 ml of water, given that the final temperature of the solution is 25°C and the initial temperature of the water was 20°C?

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

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What is the enthalpy change of dissolving 15.0 grams of potassium chloride (KCl) in 250 mL of water, assuming that the density of water is 1.00 g/mL and the final solution temperature is 25.0 °C?

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

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What is the enthalpy change of dissolving 10.0 g of NaCl in 500 mL of water at 25°C, assuming the solution has a specific heat capacity of 4.18 J/g°C?

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

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What is the enthalpy change of dissolving 5 grams of sodium hydroxide (NaOH) in 100 mL of water? The molar enthalpy of dissolution of NaOH is -44.51 kJ/mol.

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

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What is the enthalpy change of combustion for the reaction of 0.5 moles of methane, CH4, at standard conditions?

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

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What is the enthalpy change of combustion for butane (C4H10) given that 2.50 g of butane is burned completely in oxygen to produce 8.64 kJ of heat energy?

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

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What is the enthalpy change for the reduction of iron(III) oxide to iron using hydrogen gas, given that the reaction produces 2 moles of water and the standard enthalpy of formation for iron(III) oxide is -824 kJ/mol and for water is -286 kJ/mol?

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

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Using standard enthalpies of formation, calculate the enthalpy change for the reduction of iron(III) oxide (Fe2O3) to iron metal (Fe).

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

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What is the enthalpy change for the reduction of CuO using hydrogen gas, given that 2.50g of CuO (s) is reacted with 0.500L of H2 (g) at STP? The balanced chemical equation for the reaction is CuO (s) + H2 (g) -> Cu (s) + H2O (l).

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 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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