Answers by TheScientist

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Sure, here is a precise problem for the student to solve:Calculate the heat capacity (in J/K) of a 50.0 g sample of an unknown substance that requires 167 J to increase its temperature by 5.00 °C.

answered Mar 1 in ThermoChemistry

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What is the heat capacity of 25 grams of water if its temperature rises from 20°C to 50°C?

answered Mar 1 in Chemical thermodynamics

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What is the heat capacity of 50 grams of water at a temperature of 25°C, given that the specific heat of water is 4.18 J/g•°C?

answered Mar 1 in Chemical thermodynamics

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What is the heat capacity of a 50 g sample of iron at 25°C, given that the specific heat capacity of iron is 0.45 J/g °C?

answered Mar 1 in Chemical thermodynamics

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What is the heat capacity of 20 grams of water if it is heated from 25°C to 50°C?

answered Mar 1 in Chemical thermodynamics

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What is the Gibbs free energy change at 298 K for the reaction 2Fe2+(aq) + Cl2(g) --> 2Fe3+(aq) + 2Cl-(aq) if the standard electrode potentials for the half-reactions are E°(Fe3+(aq) + e- --> Fe2+(aq)) = -0.77 V and E°(Cl2(g) + 2e- --> 2Cl-(aq)) = 1.36 V?

answered Mar 1 in ElectroChemistry

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What is the Gibbs free energy change for the electrochemical reaction:Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s)given that the standard reduction potentials are E°(Cu2+|Cu) = +0.34 V and E°(Zn2+|Zn) = -0.76 V, and the reaction is carried out at 25°C?

answered Mar 1 in ElectroChemistry

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What is the Gibbs free energy change of a spontaneous electrochemical reaction where zinc metal electrode is used as an anode and copper metal electrode is used as a cathode, with a cell potential of 1.10 V?

answered Mar 1 in ElectroChemistry

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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)?

answered Mar 1 in Chemical thermodynamics

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What is the Gibbs free energy change for the reaction of Zinc with Copper sulfate solution in which Zinc gets oxidized to Zinc sulfate and Copper ions get reduced to Copper metal, given the standard reduction potentials for each half-reaction?

answered Mar 1 in ElectroChemistry

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What is the Gibbs free energy change at 25°C for the reaction: 2NO(g) + O2(g) → 2NO2(g) given that the standard Gibbs free energy of formation of NO, O2, and NO2 are +90.4 kJ/mol, 0 kJ/mol and +51.3 kJ/mol, respectively?

answered Mar 1 in Chemical thermodynamics

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What is the Gibbs free energy change for the reaction where 2 moles of hydrogen gas (H2) react with 1 mole of oxygen gas (O2) to form 2 moles of water vapor (H2O) at standard conditions (298 K and 1 atm pressure)?

answered Mar 1 in Chemical thermodynamics

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What is the Gibbs free energy change for the reaction of hydrogen gas (H2) and chlorine gas (Cl2) to form hydrochloric acid (2HCl) at standard conditions (298 K and 1 atm)?

answered Mar 1 in Chemical thermodynamics

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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.

answered Mar 1 in Quantum Chemistry

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What is the Gibbs free energy change for the formation of 2 moles of water molecules from hydrogen gas and oxygen gas at standard conditions (298 K and 1 atm pressure)? Give the answer in kJ/mol.

answered Mar 1 in Chemical thermodynamics

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What is the Gibbs free energy change for the electrochemical reduction of 1 mol of Au3+ to Au in a standard electrochemical cell with a cell potential of 1.42 V at 298 K?

answered Mar 1 in ElectroChemistry

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What is the Gibbs free energy change for the electrochemical reaction involving the oxidation of copper, Cu, to copper (II) ions, Cu2+, in a solution of CuSO4 with a potential of 0.78 V at 25°C?

answered Mar 1 in ElectroChemistry

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What is the Gibbs free energy change for the electrochemical reaction when a copper electrode is placed in a 1 M copper(II) sulfate solution and a standard hydrogen electrode (SHE) is placed in a 1 M hydrogen ion solution at 25°C?

answered Mar 1 in ElectroChemistry

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What is the Gibbs free energy change (ΔG) for the reaction, given the standard Gibbs free energy change (ΔG°) and the reaction quotient (Q)? For example, for the reaction A + B → C, if ΔG° is -100 kJ/mol and Q is 0.5, what is the ΔG for the reaction?

answered Mar 1 in Chemical thermodynamics

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What is the fundamental vibrational frequency and corresponding infrared spectrum of the water molecule (H2O) in its ground state?

answered Mar 1 in Quantum Chemistry

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