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What is the standard enthalpy change for the reaction when 50 ml of 0.2 M hydrochloric acid is mixed with 50 ml of 0.1 M sodium hydroxide solution at 25°C? The specific heat capacity of the mixed solution is 4.18 J/g°C and the density is 1 g/mL.

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

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What is the standard enthalpy change for the reaction between 50.0 mL of 0.100 M HCl(aq) and 50.0 mL of 0.100 M NaOH(aq) at 25 °C, given that the temperature change of the mixture was 10.0 °C and the specific heat capacity of the solution is 4.18 J/(g·K)?

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

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What is the diffusion coefficient of oxygen gas in air at a temperature of 25°C and 1 atm pressure?

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

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How can we accurately detect and quantify the levels of pesticide residues in various types of food samples and determine their potential health impacts on human consumers?

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

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How can we design a polymer-based sensor that accurately detects the presence of heavy metals in water samples?

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

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What is the exchange current density for a corroding iron electrode in a 0.1 M solution of Fe2+ ions at 25°C, given that the rate constant for the electrode reaction is 1.2 x 10^-9 cm/s and the standard reduction potential for Fe2+/Fe is -0.44 V?

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

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What is the bond length between nitrogen and oxygen atoms in NO molecule? Given the bond energy of NO is 602 kJ/mol and the reduced mass of the NO molecule is 14.8 amu.

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

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What is the standard enthalpy change for the reaction of gaseous hydrogen and gaseous iodine to form hydrogen iodide at standard temperature and pressure? Show all steps of calculation using Hess's Law and relevant thermochemical equations.

asked Mar 1 in Chemical thermodynamics 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, ΔG, for the reaction 2H2(g) + O2(g) → 2H2O(g) at 25°C and 1 bar, given the standard Gibbs free energy of formation values for H2(g), O2(g), and H2O(g)?

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

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Sure, here's a problem for you:Consider the following reaction: N2 (g) + 3 H2 (g) ⇌ 2 NH3 (g)If the equilibrium concentrations of N2, H2 and NH3 are 0.25 M, 0.75 M and 0.50 M, respectively, calculate the equilibrium constant (Kc) for the reaction.

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

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What is the balanced half-reaction for the oxidation of ethanol (C2H5OH) to acetic acid (CH3COOH) and what is the oxidation state change of carbon in this reaction?

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

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What are the significant factors that affect carbon footprint, and how can you reduce it to minimize its impact on the environment?

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

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What is the yield of 2,4-dinitrophenol obtained from the reaction of phenol and nitric acid when starting with 10 grams of phenol and 15 mL of 65% nitric acid under specific reaction conditions?

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

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What is the bond dissociation energy of the carbon-hydrogen bond in methane (CH4) when using experimental data from a combustion reaction that indicates the combustion of 1 mole of methane releases 890.4 kJ of heat?

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

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What is the mechanism behind thermal degradation of polyethylene and how can the stability of the polymer be improved?

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

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What is the BET surface area of activated carbon with a monolayer capacity of 25 mg/g and a multilayer capacity of 90 mg/g, given that the weight of the activated carbon used for the experiment was 5 g?

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

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What is the yield of 2,4-dichlorobenzoic acid that can be obtained from the reaction between 100 grams of benzoic acid and 50 grams of chlorine gas, assuming an 80% yield for the reaction?

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

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What is the entropy change (∆S) for the following reaction?2H2(g) + O2(g) → 2H2O(l)Given that the standard molar entropy of H2(g), O2(g), and H2O(l) are 131.3 J/K•mol, 205.0 J/K•mol, and 70.0 J/K•mol respectively.

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

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What is the heat released or absorbed when 50 g of water freezes to ice at -10°C, given that the heat of crystallization for water is 6.01 kJ/mol?

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

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