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How can we reduce the carbon footprint of a chemical manufacturing process, while still maintaining the efficiency and profitability of the process?

asked Mar 1 in Environmental Chemistry by TheScientist (138k points)

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What is the surface area of a powdered sample of activated carbon if the amount of nitrogen gas adsorbed at -196°C is 25.6 mL/g and the cross-sectional area of nitrogen molecule is 16.2 Å²?

asked Mar 1 in Surface Chemistry by TheScientist (138k points)

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What is the power output (in Watts) of an electrochemical cell at standard conditions, given that the cell potential is 1.5V and the total resistance of the circuit is 10 ohms?

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

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What is the polarization in an electrochemical cell when the current density is 200 A/m², the effective surface area of the electrode is 50 cm², the electrode potential is -0.5V and the electrolyte resistance is 10 Ω?

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

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What is the Gibbs free energy change for the formation of 2 moles of water molecules from hydrogen gas and oxygen gas at standard conditions (298 K and 1 atm pressure)? Give the answer in kJ/mol.

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

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What are the differences between Thermogravimetry Analysis (TGA) and Differential Scanning Calorimetry (DSC) in terms of their principles, advantages, and applications in polymer characterization?

asked Mar 1 in Polymer Chemistry by TheScientist (138k points)

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What is the Gibbs free energy change for the electrochemical reduction of 1 mol of Au3+ to Au in a standard electrochemical cell with a cell potential of 1.42 V at 298 K?

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

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What is the standard enthalpy change for the neutralization of 25.0 mL of 0.100 M hydrochloric acid with 25.0 mL of 0.100 M sodium hydroxide, given that the specific heat capacity of the solution is 4.18 J/g°C and the temperature change is 5.0°C?

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

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What is the standard enthalpy change for the fusion of 10 grams of ice at 0°C to liquid water at 25°C? Given the standard enthalpy of fusion for ice is 6.01 kJ/mol and the specific heat capacity of water is 4.18 J/g°C.

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

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In an experiment, 50 mL of 1 M HCl solution was mixed with 50 mL of 1 M NaOH solution. The temperature change was recorded as 10°C. Calculate the standard enthalpy change of neutralization for the reaction between HCl and NaOH.

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

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What is the standard enthalpy change of dissolution for 5.00 grams of solid sodium hydroxide (NaOH) in 100.0 mL of water at 25°C? Given: The molar enthalpy of dissolution of NaOH is -44.51 kJ/mol and the density of water is 0.997 g/mL.

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

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What is the formal charge on the central sulfur atom in the sulfate ion (SO4^2-)?

asked Mar 1 in Inorganic Chemistry by TheScientist (138k points)

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Using quantum chemistry calculations, analyze the effects of solvent polarity on the intermolecular interactions between ethanol and water molecules in a mixture, and explain how it influences the solubility of ethanol in water.

asked Mar 1 in Quantum Chemistry by TheScientist (138k points)

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How can we design a chemical process to efficiently produce a high-quality, environmentally-friendly water-based paint with desired properties such as gloss, durability, and pigment dispersion?

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

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What is the theoretical yield of nylon-6,6 that can be produced from the reaction of 25 grams of adipic acid and 35 grams of hexamethylenediamine? (Assuming 100% reaction efficiency)

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

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What is the specific surface area (in m²/g) of a sample of activated carbon that adsorbs 20 ml of nitrogen gas at STP, assuming monolayer formation and a nitrogen cross-sectional area of 0.162 nm²? The mass of the activated carbon sample is 0.5 g.

asked Mar 1 in Surface Chemistry by TheScientist (138k points)

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What is the enthalpy change, in kilojoules per mole, when 6.0 grams of potassium chloride (KCl) is dissolved in 200.0 mL of water at 25°C? The molar heat of dissolution of KCl is -57.3 kJ/mol.

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

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What is the specific surface area of a sample of activated carbon with a BET value of 1000 m²/g, given that the mass of the sample used for the measurement is 0.5 g?

asked Mar 1 in Surface Chemistry 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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How can we control the rate of phosphorescence decay in a particular phosphorescent material under different temperature and light intensity conditions?

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

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