Recent questions in ThermoChemistry

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What is the amount of heat absorbed in the process of melting 10 grams of ice at 0°C, given that the enthalpy of fusion of ice is 6.01 kJ/mol? Show the calculations and round off to two significant figures.

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

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1 answer 72 views

What is the amount of heat absorbed by 25 g of ice at -10°C when it is converted to water at 20°C? Given the enthalpy of fusion of ice is 6.01 kJ/mol and the specific heat capacity of water is 4.18 J/g°C.

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

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What is the amount of energy required to vaporize 50 grams of water at its normal boiling point? The enthalpy of vaporization of water is 40.7 kJ/mol.

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

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1 answer 71 views

What is the amount of energy required to vaporize 50 grams of water at its boiling point, given that the enthalpy of vaporization of water is 40.7 kJ/mol?

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

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What is the amount of energy required to melt 50 grams of ice at 0°C, given that the heat of fusion of ice is 333.55 J/g?

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

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1 answer 66 views

What is the standard enthalpy of formation of hydrogen gas (H2) given that the standard enthalpy of combustion for hydrogen gas is -286 kJ/mol and the standard enthalpy of formation of water (H2O) is -285.8 kJ/mol?

asked Feb 25 in ThermoChemistry by TheScientist (138k points)

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What is the standard enthalpy of formation of carbon dioxide (CO2) given that the standard enthalpy of combustion of carbon (C) and hydrogen gas (H2) are -394 kJ/mol and -286 kJ/mol, respectively?

asked Feb 25 in ThermoChemistry by TheScientist (138k points)

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1 answer 61 views

What is the standard enthalpy of formation of ammonia gas (NH3) at 298 K, given that the standard enthalpy of formation of nitrogen gas (N2) and hydrogen gas (H2) are 0 kJ/mol and 0 kJ/mol, respectively?

asked Feb 25 in ThermoChemistry by TheScientist (138k points)

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1 answer 74 views

What is the standard enthalpy of formation of carbon dioxide (CO2) from its elements at standard conditions if the standard enthalpy of formation of carbon (C) and oxygen (O2) are -94.05 kJ/mol and 0 kJ/mol, respectively?

asked Feb 25 in ThermoChemistry by TheScientist (138k points)

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1 answer 71 views

What is the standard enthalpy of formation of carbon dioxide (CO2) when combustion of graphite and oxygen gas is proceeded? Given the standard enthalpy of formation of graphite is 0, and the standard enthalpy of formation of O2 is 0.

asked Feb 25 in ThermoChemistry by TheScientist (138k points)

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1 answer 78 views

What is the standard enthalpy change of formation of hydrogen gas (H2) when one mole of hydrogen gas is formed from its elements under standard conditions, given that the standard enthalpy change of formation for water (H2O) is -285.8 kJ/mol?

asked Feb 25 in ThermoChemistry by TheScientist (138k points)

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1 answer 81 views

What is the heat of sublimation of carbon dioxide (CO2) at standard pressure and temperature (STP)?

asked Feb 20 in ThermoChemistry by RandellBeggs (2.0k points)

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1 answer 77 views

What is the heat of sublimation of iodine, given that the molar heat of fusion is 15.52 kJ/mol and the molar heat of vaporization is 41.39 kJ/mol?

asked Feb 20 in ThermoChemistry by DieterSchrod (1.9k points)

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1 answer 71 views

What is the heat of sublimation for dry ice (solid carbon dioxide) given that its enthalpy of fusion is 9.2 kJ/mol and its enthalpy of vaporization is 25.1 kJ/mol?

asked Feb 20 in ThermoChemistry by TiaraFitzgib (2.1k points)

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1 answer 74 views

What is the heat of sublimation for dry ice (solid carbon dioxide) if it requires 25.2 kJ of energy to sublime 1 mole of dry ice at its standard-state conditions?

asked Feb 20 in ThermoChemistry by WallaceMaria (2.4k points)

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1 answer 78 views

What is the heat of hydration for magnesium sulfate when dissolved in water, assuming a mass of 10 grams of magnesium sulfate is dissolved in 100 mL of water?

asked Feb 20 in ThermoChemistry by AundreaWhitf (1.8k points)

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1 answer 72 views

What is the heat capacity of a substance if it takes 345 Joules of energy to raise the temperature of 15 grams of the substance by 12 degrees Celsius?

asked Feb 20 in ThermoChemistry by 540252730007 (1.9k points)

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1 answer 71 views

What is the standard enthalpy of formation of sodium chloride (NaCl) given the following information: the standard enthalpy of formation of sodium (Na) is -108.5 kJ/mol and the standard enthalpy of formation of chlorine (Cl2) is 0 kJ/mol?

asked Feb 20 in ThermoChemistry by RebekahH3016 (1.9k points)

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1 answer 74 views

What is the enthalpy change for the oxidation of 1 mole of ethanol to acetic acid? Given the following balanced chemical equation for the reaction: C2H5OH + 2O2 → 2CO2 + 3H2O ∆H = -1367 kJ/mol.

asked Feb 20 in ThermoChemistry by DevonHamlett (2.3k points)

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1 answer 83 views

What is the enthalpy of vaporization for water at 100°C, given that its molar heat of vaporization at its boiling point is 40.7 kJ/mol?

asked Feb 20 in ThermoChemistry by DexterTejada (1.7k points)

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