Answers by StantonBrand

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Calculate the enthalpy change of desorption of water from a graphite surface if the initial pressure of water is 10 torr and the final pressure is 1 torr at a constant temperature of 300 K. The surface area of the graphite is 50 cm² and the heat of adsorption of water on the surface is -40 kJ/mol.

answered Jan 23 in ThermoChemistry

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Calculate the change in enthalpy for the combustion of 2 moles of methane gas (CH4) at a constant pressure of 1 atmosphere and a temperature of 298 K. Given the standard enthalpy of formation for methane is -74.81 kJ/mol.

answered Jan 23 in Physical Chemistry

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Calculate the bond dissociation energy of the carbon-hydrogen bond in methane (CH4) given that the bond enthalpy of C-H bond is 413 kJ/mol.

answered Jan 23 in Chemical bonding

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A chemistry student wants to determine the effect of temperature on the ionization constant (Ka) of a weak acid. The initial Ka of the acid is 1.32 × 10^-6 at 25°C. If the temperature is increased to 35°C, calculate the new value of Ka for the weak acid.

answered Jan 22 in Chemical equilibrium

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Compare the theoretical mechanisms underlying the effects of benzodiazepines and serotonin agonists in the treatment of anxiety disorders.

answered Jan 16 in Psychology

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What is implicit bias?

answered Jan 14 in Psychology

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The calvin cycle and light reactions are the two stages of what process?

answered Dec 31, 2024 in Science

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What is the primary cause of air movement in the troposphere?

answered Dec 28, 2024 in Science

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