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How can we design and implement educational programs that better incorporate chemistry into everyday life, in order to increase students' interest in the subject and promote better understanding of the impact of chemistry on the world around us?

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

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How can we calculate the thermodynamic properties of a gas (such as internal energy, entropy, and free energy) by using different thermodynamic ensembles and statistical mechanical principles?

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

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Sure, here's a problem:Calculate the standard enthalpy change for the combustion of methane gas (CH4) using the following information:Formation of CO2: -393.5 kJ/molFormation of H2O: -285.8 kJ/molFormation of CH4: -74.8 kJ/mol

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

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What is the standard enthalpy change for the following reaction, where 2 moles of solid iron (Fe) reacts with 1 mole of oxygen gas (O2) to produce 2 moles of solid iron (III) oxide (Fe2O3)? 4Fe(s) + 3O2(g) -> 2Fe2O3(s)

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

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What is the theoretical yield of benzocaine that can be obtained from the reaction between p-aminobenzoic acid and ethanol, assuming a 100% yield and using the stoichiometry of the reaction?

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

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How can we design a system for the production of hydrogen fuel that maximizes efficiency and minimizes cost using chemical engineering principles?

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

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What is the efficiency of an electrochemical cell with a voltage of 0.8V and a current of 2 mA when Cu and Ag electrodes are used in a CuSO4 and AgNO3 electrolyte solution, with an electrode area of 10cm² and a duration of 3 hours?

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

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How can you design a system for the efficient and sustainable production of natural flavors using bio-based and renewable resources while ensuring the highest quality and purity standards?

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

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What would be the theoretical yield of 2,4-dinitrophenol if 10 grams of phenol was used in the preparation and 85% yield was obtained?

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

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What is the bond strength of the nitrogen-hydrogen bond in ammonia (NH3) as compared to the nitrogen-hydrogen bond in hydrazine (N2H4)? Use electronegativity values and bond lengths to justify your answer.

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

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How can we design a polymer-based sensor that can detect changes in temperature or pH levels in a given solution? What type of polymer should be used, and how can the sensor be calibrated to provide accurate readings?

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

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What is the standard enthalpy change for the reaction 2CO(g) + O2(g) → 2CO2(g) at standard conditions, given that the standard enthalpy of formation for CO, O2, and CO2 are -110.5 kJ/mol,-393.5 kJ/mol, and -393.5 kJ/mol, respectively?

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

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What is the surface area of a sample of activated carbon if 10 mL of nitrogen gas (at a temperature of 25°C and a pressure of 1 atm) is adsorbed onto 0.1 g of the carbon with a monolayer capacity of 0.5 mL/g?

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

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What is the Gibbs free energy change (ΔG) for the reaction NH3(g) + HCl(g) → NH4Cl(s) at standard conditions (298 K and 1 atm)? Show the steps taken to calculate ΔG using quantum chemistry calculations.

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

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What is the yield of 2,4-dichloronitrobenzene produced from the reaction of 10 grams of nitrobenzene and excess chlorine gas, given that the reaction conditions were optimal and the purity of the final product was determined to be 95%?

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

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What is the standard enthalpy change for the phase transition reaction of water from ice to liquid at 25°C and 1 atm pressure?

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

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What is the standard Gibbs free energy change (in kJ/mol) for the reaction 2H2O (l) -> 2H2 (g) + O2 (g) at 298 K, given that the enthalpy change (ΔH) for the reaction is -483.60 kJ/mol and the entropy change (ΔS) for the reaction is 69.91 J/mol.K?

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

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What is the standard enthalpy change for the fusion of 100 grams of ice at 0°C to liquid water at 0°C? Assume that the specific heat capacity of ice and water are 2.09 and 4.18 J/g·°C, respectively, and the enthalpy of fusion of ice is 6.01 kJ/mol.

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

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What is the standard enthalpy of formation of methane gas (CH4) given the following bond energies: C-C = 347 kJ/molC-H = 413 kJ/mol (Hint: Use the formula ∆Hf° = ∑(bonds broken) - ∑(bonds formed))

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

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What is the standard enthalpy change of solution of 3.5 g of sodium hydroxide (NaOH) in 50 mL of water at a constant temperature of 25 °C?

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

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