Recent questions in ThermoChemistry

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What is the heat of neutralization of hydrochloric acid (HCl) and sodium hydroxide (NaOH) when 50 mL of 2.0 M HCl is reacted with 50 mL of 2.0 M NaOH, given that the initial and final temperatures of the solution are 25°C and 39°C, respectively?

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

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What is the heat of neutralization when 50 mL of 2.0 M hydrochloric acid reacts with 50 mL of 2.0 M sodium hydroxide solution? The specific heat capacity of the solution is 4.18 J/g °C, and the temperature change is recorded as 8.2 °C during the reaction.

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

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What is the heat of neutralization when 25 mL of 1.0 M hydrochloric acid (HCl) is added to 25 mL of 1.0 M sodium hydroxide (NaOH) solution? The temperature change of the resulting solution was recorded as 5.0°C.

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

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What is the heat of neutralization for the reaction between 50 mL of 1.0 M hydrochloric acid (HCl) and 50 mL of 1.0 M sodium hydroxide (NaOH) at a room temperature of 25°C? The enthalpy of neutralization of HCl and NaOH is -57.1 kJ/mol.

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

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What is the heat of mixing when 25 mL of 1.0 M HCl solution is added to 25 mL of 1.0 M NaOH solution at 25°C? The heat of neutralization for the reaction between HCl and NaOH is -57.1 kJ/mol.

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

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What is the heat of mixing when 50 mL of 1 M HCl is added to 50 mL of 1 M NaOH at 25°C assuming no heat loss to the surroundings? Given, the enthalpy of neutralization of 1 M HCl by 1 M NaOH is -55.9 kJ/mol.

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

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What is the heat of mixing when 20 ml of a 0.1 M HCl solution is added to 50 ml of a 0.2 M NaOH solution at room temperature, assuming complete mixing and a constant pressure?

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

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What is the heat of hydration for the reaction between 50 grams of anhydrous copper(II) sulfate and excess water, given that the final solution mass is 250 grams and the temperature change observed during the reaction is -30 °C?

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

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What is the heat of hydration when 50 grams of anhydrous calcium chloride (CaCl2) is mixed with 100 mL of water (H2O)? The molar heat of hydration for calcium chloride is -81 kJ/mol.

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

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What is the heat of hydration of magnesium sulfate (MgSO4) when 50 grams of the salt is dissolved in 500 ml of water at 25°C, given that the specific heat of the solution is 4.18 J/g°C and the enthalpy change of solution is -1048 kJ/mol?

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

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What is the heat of hydration for the reaction between magnesium sulfate heptahydrate (MgSO4•7H2O) and water (H2O) when 3.50 g of MgSO4•7H2O is dissolved in 50.0 mL of water at 25 °C? The molar heat of hydration for MgSO4•7H2O is –90.39 kJ/mol.

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

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What is the heat of hydration of calcium chloride when 50 grams of calcium chloride is dissolved in 200 mL of water at 25°C? Given the heat of hydration of calcium chloride is -82.8 kJ/mol.

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

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What is the heat of hydration for the dissolution of 10 grams of calcium chloride in 200 mL of water at a temperature of 25 degrees Celsius? Given that the heat of hydration of calcium chloride is -82.8 kJ/mol.

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

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What is the heat of hydration for MgSO4·7H2O, given that its enthalpy change per mole of hydration is -192 kJ/mol and 10 grams of MgSO4·7H2O is dissolved in 100 grams of water at 25°C?

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

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What is the heat of crystallization when 50 grams of water is frozen to form ice at a temperature of -10°C? (Assuming the heat capacity of water is 4.184 J/g°C and the heat of fusion of water is 6.01 kJ/mol)

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

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What is the heat necessary to increase the temperature of 50 grams of water by 10 degrees Celsius, using a calorimeter with a heat capacity of 20 Joules/Kelvin?

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

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What is the amount of heat generated in the complete combustion of 1 mole of methane gas (CH4) at constant pressure, assuming the standard enthalpy of formation of CH4 is -74.8 kJ/mol and the standard enthalpy of formation of CO2 is -393.5 kJ/mol?

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

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What is the heat evolved or absorbed when 50.0 mL of 0.100 M nitric acid (HNO3) is neutralized with 50.0 mL of 0.100 M potassium hydroxide (KOH)? Given that the standard heat of neutralization for the reaction between HNO3 and KOH is -57.1 kJ/mol.

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

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1 answer 35 views

Sure, here is a precise problem for the student to solve:Calculate the heat capacity (in J/K) of a 50.0 g sample of an unknown substance that requires 167 J to increase its temperature by 5.00 °C.

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

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What is the enthalpy of vaporization of water if 50.0 g of water at 100°C is converted to steam at 100°C? The heat capacity of water is 4.184 J/g°C and the molar heat of vaporization of water is 40.7 kJ/mol.

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

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