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Given a certain substance with a mass of 25 grams and an initial temperature of 25°C, if it absorbs 500 joules of heat energy, what is the final temperature of the substance? The heat capacity of the substance is 0.5 J/g·°C.

asked Feb 4 in Chemical thermodynamics by PercyJxq5456 (350 points)

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Given a certain electrochemical reaction, the anodic and cathodic Tafel slopes were found to be 60 mV/decade and 100 mV/decade, respectively. Calculate the exchange current density of the reaction.

asked Feb 4 in ElectroChemistry by MahaliaSchul (330 points)

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For the reaction below, calculate the equilibrium constant (K) when the electrode potentials are E°(Cu2+/Cu) = +0.34 V and E°(Ag+/Ag) = +0.80 V:Cu(s) + 2Ag+(aq) → Cu2+(aq) + 2Ag(s)

asked Feb 4 in ElectroChemistry by MarcelinoMos (370 points)

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For the electrochemical reaction + ↔ + , the cell potential is 0.60 V at 25°C. If the standard reduction potential of 2+ is 0.34 V and that of 2+ is -0.74 V, calculate the equilibrium constant () for the reaction at 25°C.

asked Feb 4 in ElectroChemistry by DaisyStow838 (310 points)

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For a student studying surface chemistry and the adsorption of gases on solid surfaces, a precise problem could be: What is the effect of temperature on the adsorption of nitrogen gas on activated charcoal and how does it change the isotherm?

asked Feb 4 in Surface Chemistry by AlexisDupree (330 points)

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For a given organic molecule with a Lewis structure, what is the frequency of infrared radiation that would induce the greatest change in the dipole moment of the molecule?

asked Feb 4 in Quantum Chemistry by MacA45345291 (470 points)

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Find the standard enthalpy change for the reaction: 2C2H5OH(l) + 9O2(g) --> 6CO2(g) + 8H2O(l) given the following information: Standard enthalpy of formation (ΔHfº) of C2H5OH(l) = -277 kJ/mol Standard enthalpy of formation (ΔHfº) of CO2(g) = -393.5 kJ/mol Standard enthalpy of formation (ΔHfº) of H2O(l) = -285.8 kJ/mol Assume that the reaction occurs at standard conditions.

asked Feb 4 in Chemical thermodynamics by AnhGormansto (330 points)

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Find the standard enthalpy change for the formation reaction of methane gas (CH4) from its elements in their standard states, given the following standard enthalpy of formation values: ΔHf°[CH4] = -74.81 kJ/mol ΔHf°[H2] = 0 kJ/mol ΔHf°[C(graphite)] = 0 kJ/mol

asked Feb 4 in Chemical thermodynamics by Charles0759 (610 points)

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Find the oxidation state of chromium in the compound K2Cr2O7.

asked Feb 4 in Chemical reactions by AlicaOrmond1 (350 points)

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Explore the relationship between the coordination number and the geometry of transition metal complexes, citing specific examples from the literature.

asked Feb 4 in Coordination Chemistry by CaryLangford (570 points)

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Explain why some molecules with polar bonds are nonpolar in nature and provide a few examples.

asked Feb 4 in Chemical education by Troy33809250 (490 points)

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Explain the role of ion channels in signal transduction pathways and provide an example of a specific ion channel and its function in cellular signaling.

asked Feb 4 in BioChemistry by FayeJle84610 (330 points)

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Explain the mechanism of chelation therapy with reference to coordination chemistry principles and discuss the effectiveness of EDTA as a chelating agent in the treatment of heavy metal poisoning.

asked Feb 4 in Coordination Chemistry by KeiraMcLerie (510 points)

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1 answer 51 views

Explain the factors affecting the stability of colloidal dispersion and the phenomenon of coagulation with suitable examples.

asked Feb 4 in Surface Chemistry by CarmeloCluni (390 points)

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Explain the differences in the photochemical properties of transition metal complexes based on their ligand environments.

asked Feb 4 in PhotoChemistry by TheresaCorle (500 points)

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Explain how the glass transition temperature of a polymer is influenced by its molecular weight and degree of branching.

asked Feb 4 in Physical Chemistry by Scarlett72X1 (470 points)

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Does the rate of a photochemical reaction increase linearly with the increase in light intensity, or is there a maximum intensity beyond which no further increase in the rate is observed? Provide experimental evidence to support your answer.

asked Feb 4 in PhotoChemistry by TajDees16093 (350 points)

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Does the concentration of reactants in a chemical reaction affect the reaction yield, and if so, what is the relationship between the two variables?

asked Feb 4 in Chemical kinetics by MartyMusgrav (230 points)

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Does surface modification of a polymer affect its stability and adhesion properties when used in biomedical applications?

asked Feb 4 in Surface Chemistry by %login% (330 points)

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Does changing the concentration of reactants affect the reaction rate and ultimately, the profitability of the reaction in the synthesis of a particular chemical compound? If so, what is the optimal concentration of reactants that maximizes both the reaction rate and profitability?

asked Feb 4 in Chemical kinetics by SidneyIvy08 (570 points)

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