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Calculate the enthalpy of adsorption of nitrogen gas on the surface of activated charcoal at 298 K, given that the equilibrium pressure of nitrogen is 8.5 x 10^-3 atm and the surface area of the charcoal is 1200 m^2/g.

asked Jan 23 in ThermoChemistry by WilhelminaWi (710 points)

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Calculate the enthalpy of adsorption of methane gas on activated charcoal at room temperature (25°C) given the following information:- The saturation pressure of methane at 25°C is 3.78 MPa.- The surface area of activated charcoal used is 100 m²/g.- The amount of methane adsorbed on the activated charcoal is 5 mmol/g.

asked Jan 23 in ThermoChemistry by TravisJohnst (230 points)

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Calculate the enthalpy of adsorption of hydrogen gas on platinum at 298 K, given that the maximum coverage of hydrogen on the platinum surface is 0.5 monolayers and the equilibrium constant for the process at 298 K is 2.5 x 10^3. Assume that the adsorption process is exothermic and that the standard enthalpy of formation of water is -286 kJ/mol.

asked Jan 23 in ThermoChemistry by StephanyH84 (530 points)

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Calculate the enthalpy of adsorption of hydrogen gas on activated carbon if 2 grams of activated carbon absorb 0.025 moles of hydrogen gas at 298 K and the pressure of the system is 1 atm. The molar enthalpy of hydrogen gas is -285.8 kJ/mol at constant pressure.

asked Jan 23 in ThermoChemistry by DaleHayden7 (370 points)

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Calculate the enthalpy of adsorption of benzene vapor on silica gel at 25°C and a pressure of 2.0 atm, given that the mass of adsorbent used is 0.25 g and the adsorption capacity of silica gel for benzene at this temperature and pressure is 0.75 g/g.

asked Jan 23 in ThermoChemistry by ShaunTulloch (470 points)

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Calculate the enthalpy of adsorption of 1 mole of hydrogen gas on the surface of activated charcoal from the given data:- The heat of combustion of hydrogen gas at constant volume is -285.8 kJ/mol- The heat of combustion of hydrogen gas at constant pressure is -241.8 kJ/mol- The heat of vaporization of hydrogen gas at its boiling point (20.3 K) is 0.452 kJ/mol- The surface area of activated charcoal is 500 m²/g- The weight of activated charcoal used is 0.5 g.

asked Jan 23 in ThermoChemistry by GlendaQnw26 (350 points)

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Calculate the enthalpy of adsorption for the adsorption of nitrogen gas on activated carbon at 298 K, given that the partial pressure of nitrogen gas is 1.2 atm and the amount of adsorbate adsorbed per gram of adsorbent is 0.45 mol/g. The enthalpy of liquefaction of nitrogen gas at boiling point (-196 °C) is -5.58 kJ/mol.

asked Jan 23 in ThermoChemistry by ElbaFedler88 (570 points)

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1 answer 52 views

Calculate the enthalpy of adsorption for the adsorption of hydrogen gas onto a nickel surface at 25°C, given that the equilibrium pressure of hydrogen gas is 0.5 atm and the surface coverage is 0.2 monolayers. The heat of dissociation of hydrogen gas is 436 kJ/mol.

asked Jan 23 in ThermoChemistry by GinoSalas737 (520 points)

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Calculate the enthalpy of adsorption for the adsorption of 5 grams of hydrogen gas on a solid adsorbent at a temperature of 298 K, if the pressure of hydrogen gas is 2.5 atm and the volume of the adsorbent is 100 cm3. Assume ideal gas behavior and use the equation ΔH = -q/n, where ΔH is the enthalpy of adsorption, q is the heat absorbed, and n is the number of moles of gas adsorbed.

asked Jan 23 in ThermoChemistry by AlycePulley2 (330 points)

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Calculate the enthalpy of adsorption for the adsorption of 2.5 moles of nitrogen gas at 298 K on the surface area of 1 gram of activated charcoal, given that the partial pressure of nitrogen gas is 0.1 atm. The heat of vaporization of nitrogen is 5.6 kJ/mol. Express your answer in kJ/mol.

asked Jan 23 in ThermoChemistry by WarnerThaxto (490 points)

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1 answer 37 views

Calculate the enthalpy of adsorption for a reaction where 2 moles of nitrogen gas (N2) are adsorbed on the surface of a solid at -100°C. Given that the partial pressure of N2 in the gas phase is 0.2 atm and the equilibrium constant for adsorption of N2 at this temperature is 2.5 x 10^3. Assume the adsorption is a reversible process and that the ideal gas law can be used to calculate partial pressures.

asked Jan 23 in ThermoChemistry by NestorQuh331 (510 points)

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1 answer 37 views

Calculate the enthalpy change when solid sodium hydroxide (NaOH) is dissolved into water, given that the desorption enthalpy of NaOH is 44.51 kJ/mol and the molar heat of solution is -44.51 kJ/mol.

asked Jan 23 in ThermoChemistry by FatimaChatte (410 points)

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1 answer 54 views

Calculate the enthalpy change when 50.0 grams of ammonium nitrate dissolves in 250 mL of water at 25°C. The initial temperature of water was also 25°C and the final temperature after dissolution was 18.5°C. The molar mass of ammonium nitrate is 80.04 g/mol and the specific heat of water is 4.184 J/g°C. Assume that the heat capacity of the solution is the same as that of water.

asked Jan 23 in ThermoChemistry by MariThorson (670 points)

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Calculate the enthalpy change when 50 mL of water at 20°C is mixed with 30 mL of ethanol at 30°C. The specific heat capacity of water is 4.18 J g^-1 °C^-1, the specific heat capacity of ethanol is 2.44 J g^-1 °C^-1, and the density of both water and ethanol are 1 g/mL. Assume that the final mixture is at a uniform temperature.

asked Jan 23 in ThermoChemistry by EveretteAria (490 points)

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1 answer 38 views

Calculate the enthalpy change when 50 mL of 2 M HCl solution reacts with excess NaOH according to the balanced chemical equation: HCl (aq) + NaOH (aq) → NaCl (aq) + H2O (l) Given that the specific heat capacity of the solution is 4.18 J/g°C, and the initial and final temperatures of the solution are 25°C and 35°C, respectively. Assume a density of 1 g/mL for the solution.

asked Jan 23 in Chemical reactions by JustineDez22 (470 points)

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Calculate the enthalpy change when 50 mL of 0.2 M sodium chloride solution is mixed with 50 mL of 0.2 M silver nitrate solution. The final temperature of the solution was found to be 25°C and the initial temperature of the reactants was 30°C. The specific heat of the solution is 4.18 J/g°C, and the density of the solution is 1.00 g/mL.

asked Jan 23 in ThermoChemistry by GeorgettaCon (430 points)

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Calculate the enthalpy change when 50 ml of 0.2 M sodium chloride solution is mixed with 50 ml of 0.1 M silver nitrate solution. Given the enthalpy of precipitation of silver chloride as -64.8 kJ/mol.

asked Jan 23 in ThermoChemistry by AdrieneSimps (410 points)

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1 answer 56 views

Calculate the enthalpy change when 2.5 moles of methane gas is completely burned in excess oxygen gas if the enthalpy of formation of methane is -74.8 kJ/mol and the enthalpy of formation of water is -285.8 kJ/mol, and the enthalpy of formation of carbon dioxide is -393.5 kJ/mol.

asked Jan 23 in ThermoChemistry by DelFannin06 (410 points)

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1 answer 61 views

Calculate the enthalpy change when 2 moles of nitrogen gas are adsorbed onto the surface of activated charcoal at a temperature of 298 K, given that the pressure of nitrogen is 1 atm and the final pressure of nitrogen adsorbed is 0.5 atm. The standard enthalpy of formation of nitrogen gas is 0 kJ/mol.

asked Jan 23 in ThermoChemistry by ImogenePined (310 points)

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Calculate the enthalpy change required to ionize 2 moles of magnesium atoms to form Mg2+ ions, given that the first ionization energy of magnesium is 737 kJ/mol and the second ionization energy is 1450 kJ/mol.

asked Jan 23 in ThermoChemistry by AltaDeamer5 (510 points)

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