Recent questions in Chemical thermodynamics

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Determine the standard enthalpy change for the precipitation reaction of 10.0 g of calcium chloride (CaCl2) with excess sodium carbonate (Na2CO3) to form calcium carbonate (CaCO3) and sodium chloride (NaCl). Given the following standard enthalpies of formation: ΔHf°(CaCl2) = -795.8 kJ/mol, ΔHf°(Na2CO3) = -1130.1 kJ/mol, ΔHf°(CaCO3) = -1206.9 kJ/mol, and ΔHf°(NaCl) = -411.2 kJ/mol.

asked 1 day ago in Chemical thermodynamics by CharliKeesle (390 points)

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1 answer 22 views

Determine the standard enthalpy change for the precipitation reaction between aqueous solutions of silver nitrate (AgNO3) and potassium chloride (KCl), given the molar concentrations of AgNO3 and KCl are 0.10 M and 0.20 M, respectively. The balanced chemical equation for the reaction is:AgNO3(aq) + KCl(aq) -> AgCl(s) + KNO3(aq)The enthalpies of formation for AgNO3(aq), KCl(aq), AgCl(s), and KNO3(aq) are -365.6 kJ/mol, -436.0 kJ/mol, -127.0 kJ/mol, and -494.6 kJ/mol, respectively.

asked 1 day ago in Chemical thermodynamics by TrishaPitcai (370 points)

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1 answer 30 views

Determine the standard enthalpy change for the formation of water (H2O) when hydrogen gas (H2) reacts with oxygen gas (O2) according to the balanced equation:2H2(g) + O2(g) → 2H2O(l)Given that the standard enthalpy change of formation for H2O(l) is -285.8 kJ/mol, calculate the amount of heat absorbed or released when 4.50 moles of H2O(l) is formed under standard conditions.

asked 1 day ago in Chemical thermodynamics by InaLewers025 (330 points)

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1 answer 32 views

Determine the standard enthalpy change for the formation of methane gas (CH4) from its constituent elements (C and H2) given the following standard enthalpy of formation values: ΔHf°(C) = 0 kJ/mol and ΔHf°(H2) = 0 kJ/mol.

asked 1 day ago in Chemical thermodynamics by Sammy51U3823 (360 points)

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1 answer 26 views

Determine the standard enthalpy change for the following reaction: Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g) Given:ΔHf°[Fe2O3(s)] = -824.2 kJ/mol ΔHf°[CO(g)] = -110.5 kJ/mol ΔHf°[Fe(s)] = 0 kJ/mol ΔHf°[CO2(g)] = -393.5 kJ/mol

asked 1 day ago in Chemical thermodynamics by FaustoRhea01 (410 points)

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1 answer 16 views

Determine the standard enthalpy change for the following reaction: 2 Fe (s) + 3/2 O2 (g) → Fe2O3 (s) Given the following data: - ΔHf° of Fe2O3 (s) = -826 kJ/mol - ΔHf° of O2 (g) = 0 kJ/mol - The heat capacity of the calorimeter is 135 J/°C Assume that the reaction takes place at constant pressure and that the heat absorbed by the calorimeter is negligible.

asked 1 day ago in Chemical thermodynamics by RichSizemore (830 points)

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1 answer 24 views

Determine the standard enthalpy change for the dissolution of 5.00 grams of magnesium chloride in water, given that the molar mass of MgCl2 is 95.21 g/mol and the standard enthalpy change of formation for magnesium chloride is -641.3 kJ/mol.

asked 1 day ago in Chemical thermodynamics by MaisieFenton (510 points)

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1 answer 28 views

Determine the standard electrode potential, given that the standard reduction potential for the half-reaction, Ag+ (aq) + e- → Ag(s) is +0.80 V and the standard oxidation potential for the half-reaction, Fe(s) → Fe2+(aq) + 2e-, is -0.44 V. Using this information, predict whether or not the reaction Ag(s) + Fe2+(aq) → Fe(s) + Ag+(aq) will occur spontaneously under standard conditions.

asked 1 day ago in Chemical thermodynamics by FedericoWess (450 points)

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1 answer 32 views

Determine the heat capacity of aluminum if 50.0 g of the metal is heated from 25°C to 75°C using 100.0 J of heat energy.

asked 1 day ago in Chemical thermodynamics by ChanteCamari (610 points)

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1 answer 45 views

Determine the heat capacity of a 50-g sample of iron that is heated from 25°C to 100°C using 500 J of heat.

asked 1 day ago in Chemical thermodynamics by Julissa70G4 (430 points)

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1 answer 33 views

Determine the equilibrium constant (Kc) for the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g), given that at a certain temperature, the initial concentrations of SO2, O2, and SO3 were 0.10 M, 0.20 M, and 0.05 M, respectively, and the reaction was allowed to reach equilibrium.

asked 1 day ago in Chemical thermodynamics by NormandSwaff (290 points)

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1 answer 24 views

Determine the equilibrium constant (Kc) for the chemical reaction: 2 SO2(g) + O2(g) ⇌ 2 SO3(g)Given that at a certain temperature, the concentrations of SO2, O2, and SO3 are 0.25 M, 0.15 M, and 0.40 M, respectively, at equilibrium.

asked 1 day ago in Chemical thermodynamics by HSRZak712052 (690 points)

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1 answer 35 views

Determine the entropy change for the combustion of methane gas (CH4) at constant pressure and 298 K. Given the standard molar entropy values are: S°(CH4) = 186 J/mol.K, S°(O2) = 205 J/mol.K, S°(CO2) = 214 J/mol.K and S°(H2O) = 188 J/mol.K.

asked 1 day ago in Chemical thermodynamics by BobbyeY74750 (410 points)

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1 answer 5 views

Consider the reaction of hydrogen gas (H2) and iodine gas (I2) to form hydrogen iodide (HI) at a certain temperature. If the initial concentrations of hydrogen and iodine are [H2] = 0.5 M and [I2] = 0.3 M, and the equilibrium concentration of hydrogen iodide is [HI] = 0.1 M, what is the value of the reaction quotient (Qc) for this reaction at this temperature?

asked 2 days ago in Chemical thermodynamics by RussTaverner (490 points)

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1 answer 4 views

Consider the following redox reaction:Cu(s) + 2Ag+(aq) → Cu2+(aq) + 2Ag(s)Calculate the standard free energy change (ΔG°) for the reaction at 298K, given that the standard reduction potentials for Cu2+(aq)/Cu(s) and Ag+(aq)/Ag(s) are +0.34V and +0.80V, respectively.

asked 2 days ago in Chemical thermodynamics by RicoPlath139 (310 points)

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1 answer 5 views

Consider the following reaction at 298 K:CO(g) + H2O(g) ⇌ CO2(g) + H2(g)Where the initial concentrations of CO and H2O are 0.2 M and 0.1 M, respectively. Calculate the reaction quotient, Qc, for this reaction. Is the reaction at equilibrium or not? If not, in which direction will the reaction tend to proceed to reach equilibrium?

asked 2 days ago in Chemical thermodynamics by KOPNadine630 (470 points)

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Consider the following chemical reaction: 2H2(g) + O2(g) ⇌ 2H2O(g)At a certain temperature and pressure, the partial pressures of H2, O2, and H2O are found to be 0.20 atm, 0.10 atm, and 0.80 atm, respectively. Calculate the reaction quotient (Qc) for this reaction at this temperature and pressure. Is the system at equilibrium? If not, in which direction will the reaction proceed to attain equilibrium?

asked 2 days ago in Chemical thermodynamics by MurrayFrias (510 points)

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1 answer 32 views

Certainly! Here's a precise problem for the student to solve:Calculate the standard enthalpy change ($\Delta H^\circ$) for the dissolution reaction of 5.00 g of lithium chloride ($\text{LiCl}$) in 150.0 mL of water, given that the density of water is 1.00 g/mL and the final temperature of the solution is 25.0$^\circ$C. The molar enthalpy of solution of $\text{LiCl}$ is -3.00 kJ/mol.

asked 2 days ago in Chemical thermodynamics by WillLienhop1 (490 points)

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1 answer 29 views

Calculation of standard enthalpy change for the combustion of propane.If 5 moles of propane react completely in a bomb calorimeter under standard conditions, calculate the standard enthalpy change for the combustion of propane. The balanced chemical equation for the combustion of propane is:C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(g) Given the standard enthalpy of formation at 25°C and 1 atm for C3H8(g), CO2(g), H2O(g) are -103.8 kJ/mol, -393.5 kJ/mol and -241.8 kJ/mol respectively.

asked 2 days ago in Chemical thermodynamics by MaryannePark (390 points)

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1 answer 28 views

Calculating the standard enthalpy change for the vaporization of water is a common example used in chemistry. Suppose that you have 50.0 g of liquid water at 25°C and 1 atm pressure. What is the standard enthalpy change for the vaporization of this amount of water at its boiling point, which is 100°C and 1 atm pressure?

asked 2 days ago in Chemical thermodynamics by AprilCimitie (670 points)

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Recent questions in Chemical thermodynamics

Recent questions in Chemical thermodynamics

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