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What is the standard enthalpy change for the combustion of methane (CH4) gas at 298 K and 1 atm?

asked Feb 25 in Physical Chemistry by TheScientist (138k points)

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How does the size of metallic nanoparticles affect their optical properties, and how can we calculate these properties using quantum chemical methods?

asked Feb 25 in Quantum Chemistry by TheScientist (138k points)

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What is the solubility of potassium nitrate (KNO3) in water at room temperature (25°C), and how does this value compare to the solubility of sodium chloride (NaCl) in water at the same temperature?

asked Feb 25 in Chemical bonding by TheScientist (138k points)

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How does the size of quantum dots affect their photochemical properties, specifically their quantum yield and stability, and what are the underlying mechanisms behind these effects?

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

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What is the standard electrode potential of the Zn/Zn2+ half-cell at 25°C if its standard reduction potential is -0.76 V?

asked Feb 25 in Chemical thermodynamics by TheScientist (138k points)

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What is the effect of pH on the stability of silver nanoparticles in a colloidal solution?

asked Feb 25 in Surface Chemistry by TheScientist (138k points)

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What is the effect of particle size and charge on the stability of colloidal solutions?

asked Feb 25 in Physical Chemistry by TheScientist (138k points)

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What is the specific carbohydrate-protein interaction that occurs between the enzyme amylase and the substrate starch during digestion, and how does this interaction affect the catalytic activity of amylase?

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

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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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How does the size of particles affect the stability of colloidal suspensions and their ability to scatter light? Provide experimental evidence to support your answer.

asked Feb 25 in Physical Chemistry by TheScientist (138k points)

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How does the stretching frequency of a covalent bond change with the mass of the atoms involved? Use spectroscopy and molecular vibrations to explain the relationship.

asked Feb 25 in Physical Chemistry by TheScientist (138k points)

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How does the specific arrangement of amino acids in a protein determine its 3-dimensional structure, and how does this structure relate to the function of the protein?

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

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What factors affect the stability of a colloidal solution and how can the coagulation of the colloidal particles be prevented or reversed?

asked Feb 25 in Surface Chemistry by TheScientist (138k points)

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What is the standard enthalpy change of combustion for methane (CH4) gas at 298K and 1 atm pressure?

asked Feb 25 in Quantum Chemistry by TheScientist (138k points)

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What is the solubility of Calcium Sulfate (CaSO4) in water at 25°C? Provide a numerical value and explain the factors that influence its solubility in water.

asked Feb 25 in Inorganic Chemistry by TheScientist (138k points)

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How does the size of a molecule or nanoparticle affect the quantum transport properties, such as conductivity and resistance, in molecular and nanoscale systems?

asked Feb 25 in Quantum Chemistry by TheScientist (138k points)

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What is the effect of pH on the stability of lyophobic colloids? Support your answer with appropriate examples and experimental data.

asked Feb 25 in Surface Chemistry by TheScientist (138k points)

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How does the size and charge of colloidal particles affect their stability and interactions with other particles in a solution? Provide examples from experimental data and theoretical models to support your answer.

asked Feb 25 in Physical Chemistry by TheScientist (138k points)

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What is the standard enthalpy change for the sublimation of iodine, given that the enthalpy change of fusion for iodine is +15.3 kJ/mol and the enthalpy change of vaporization for iodine is +41.7 kJ/mol?

asked Feb 25 in Chemical thermodynamics by TheScientist (138k points)

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How does the particle size and surface charge affect the stability and flocculation of colloidal suspensions in Physical Chemistry, specifically in Colloidal Chemistry?

asked Feb 25 in Physical Chemistry by TheScientist (138k points)

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