Answers by TheScientist

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What is the amount of heat released when 2.5 moles of propane (C3H8) is completely burned in oxygen gas (O2) according to the balanced equation: C3H8 + 5O2 → 3CO2 + 4H2O given that the standard enthalpy of combustion of propane is -2220 kJ/mol?

answered Mar 1 in ThermoChemistry

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What is the amount of heat needed to melt 25 grams of ice at its melting point if its enthalpy of fusion is 6.02 kJ/mol?

answered Mar 1 in ThermoChemistry

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What is the amount of heat involved in the neutralization of 25.0 mL of 0.1 M HCl with 25.0 mL of 0.1 M NaOH, given the heat of neutralization of HCl and NaOH to be -57.1 kJ/mol?

answered Mar 1 in ThermoChemistry

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What is the amount of heat energy required to vaporize 50 grams of water at its boiling point of 100°C, given that the enthalpy of vaporization of water is 40.7 kJ/mol?

answered Mar 1 in ThermoChemistry

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What is the heat capacity of a 50 g copper block when heated from 25°C to 95°C, given that the specific heat capacity of copper is 0.385 J/g·°C? Calculate the amount of heat energy required to raise the temperature of the copper block by 70°C.

answered Mar 1 in ThermoChemistry

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What is the amount of heat energy required to melt 15 grams of ice at 0°C? The enthalpy of fusion of water is 6.01 kJ/mol.

answered Mar 1 in ThermoChemistry

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What is the amount of heat energy required to melt 25 grams of ice at 0°C, given that the enthalpy of fusion of water is 6.01 kJ/mol?

answered Mar 1 in ThermoChemistry

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What would be the amount of heat energy required to change 100 grams of ice at -10°C into liquid water at 20°C? Given, the enthalpy of fusion of ice = 6.01 kJ/mol and the specific heat capacity of liquid water = 4.18 J/g°C.

answered Mar 1 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.

answered Mar 1 in ThermoChemistry

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What is the amount of heat absorbed by a 50 g sample of water when it is heated from 20°C to 100°C? (Specific heat of water= 4.18 J/g·K)

answered Mar 1 in Physical Chemistry

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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.

answered Mar 1 in ThermoChemistry

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33 views

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.

answered Mar 1 in ThermoChemistry

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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?

answered Mar 1 in ThermoChemistry

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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?

answered Mar 1 in ThermoChemistry

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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.

answered Mar 1 in Chemical reactions

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What is the activation energy for the reaction between 2 M of HCl and 2 M of NaOH at a temperature of 25°C when a voltage of 1.5 V is applied?

answered Mar 1 in ElectroChemistry

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28 views

What is the activation energy for the oxidation of hydrogen gas at a Pt electrode, where the overpotential is 100 mV and the current density is 0.5 mA/cm2?

answered Mar 1 in ElectroChemistry

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What is the activation energy for the oxidation of copper in a 1 M copper sulfate solution with a standard reduction potential of +0.34 V at 298 K, given that the exchange current density is 5.6 x 10^-6 Acm^-2 and the reaction order is unity?

answered Mar 1 in ElectroChemistry

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What is the activation energy for the electrochemical reaction that occurs when zinc metal is oxidized to form Zn2+ ions in a solution containing HCl? Calculate the activation energy at 25°C from the experimental data obtained from the Tafel plot.

answered Mar 1 in ElectroChemistry

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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.

answered Mar 1 in Chemical reactions

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