Recent questions in Chemical thermodynamics

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What is the standard enthalpy change for the vaporization of 25 grams of water at 100°C and 1 atm pressure? Given the standard enthalpy of vaporization for water is 40.7 kJ/mol.

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

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What is the standard enthalpy change for the vaporization of 10 g of water at a temperature of 100°C and atmospheric pressure?

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What is the standard enthalpy change for the transition of water from ice at -10°C to liquid water at 25°C? Provide the balanced chemical equation for this phase transition and use the appropriate values to calculate the standard enthalpy change.

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

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What is the standard enthalpy change for the transition of ice to water if 50 grams of ice is heated from -10 °C to 50 °C? The molar mass of water is 18 g/mol and the specific heat capacity of ice and water are 2.09 J/g°C and 4.18 J/g°C, respectively.

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

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What is the standard enthalpy change for the reaction that occurs when 50 ml of 0.1 M HCl is mixed with 50 ml of 0.1 M NaOH at 25°C? The equation for the reaction is: HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l).

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

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What is the standard enthalpy change for the reaction between copper sulfate pentahydrate and potassium hydroxide to form copper hydroxide and potassium sulfate, assuming all substances are in their standard state and the reaction occurs at 25°C?

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

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What is the standard enthalpy change for the reaction of calcium oxide (solid) and water to form calcium hydroxide (solid) if 3.2 grams of calcium oxide reacts with excess water under standard conditions?

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

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What is the standard enthalpy change for the reaction where 2 moles of hydrochloric acid react with 1 mole of magnesium hydroxide in aqueous solutions to produce 1 mole of magnesium chloride and 2 moles of water at 298 K and 1 atm pressure?

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

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What is the standard enthalpy change for the reaction of 2 moles of carbon with 1 mole of oxygen to form carbon monoxide, given that the process occurs at standard conditions?

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

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What is the standard enthalpy change for the reaction of zinc oxide and hydrochloric acid to form zinc chloride and water, given that all reactants and products are solids at standard temperature and pressure?

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

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What is the standard enthalpy change for the reaction between 50 mL of 1 M sulfuric acid and 40 mL of 1.5 M sodium hydroxide at 25 °C, given that the temperature change observed was 6.5 °C?

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

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Sure. What is the standard enthalpy change for the reaction of mixing 10g of ethyl alcohol (C2H5OH) with 25g of water (H2O) at 25°C, given that the heat evolved is 12.5 kJ?

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

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What is the standard enthalpy change for the reaction of [Fe(H2O)6]2+(aq) + 2Cl-(aq) → [FeCl4]2-(aq) + 6H2O(l)? Given the following bond enthalpies: Fe-Cl = 242 kJ/mol, O-H = 463 kJ/mol, and H-Cl = 431 kJ/mol.

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

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What is the standard enthalpy change for the reaction of 2-methylpropan-2-ol (C4H10O) with oxygen gas (O2) to form carbon dioxide (CO2) and water (H2O) at standard conditions?

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

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What is the standard enthalpy change for the reaction when 50 ml of 0.2 M hydrochloric acid is mixed with 50 ml of 0.1 M sodium hydroxide solution at 25°C? The specific heat capacity of the mixed solution is 4.18 J/g°C and the density is 1 g/mL.

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

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What is the standard enthalpy change for the reaction between 50.0 mL of 0.100 M HCl(aq) and 50.0 mL of 0.100 M NaOH(aq) at 25 °C, given that the temperature change of the mixture was 10.0 °C and the specific heat capacity of the solution is 4.18 J/(g·K)?

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

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What is the standard enthalpy change for the reaction between 50 mL of 0.1 M HCl and 50 mL of 0.1 M NaOH at 25°C, given that the balanced equation is HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l) and the specific heat capacity of the solution is 4.18 J/g K?

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

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What is the standard enthalpy change for the reaction 2NO(g) + O2(g) ⟶ 2NO2(g) , given that the standard enthalpy of formation of NO(g), O2(g) and NO2(g) are 90.4 kJ/mol , 0 kJ/mol, and 33.2 kJ/mol, respectively?

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

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What is the standard enthalpy change for the reaction 2SO2(g) + O2(g) → 2SO3(g) at 25°C and 1 atm pressure, given the following enthalpy of formation values: ΔfH°[SO2(g)] = -296.8 kJ/mol, ΔfH°[O2(g)] = 0 kJ/mol, and ΔfH°[SO3(g)] = -395.72 kJ/mol?

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

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What is the standard enthalpy change for the reaction 2CO(g) + O2(g) → 2CO2(g) at standard conditions, given that the standard enthalpy of formation for CO, O2, and CO2 are -110.5 kJ/mol,-393.5 kJ/mol, and -393.5 kJ/mol, respectively?

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

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