Recent questions in Chemical thermodynamics

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Calculate the standard enthalpy change for the reaction: 2H2(g) + O2(g) → 2H2O(l)Given the standard enthalpies of formation are: ΔHf°(H2O(l)) = -285.8 kJ/mol ΔHf°(H2(g)) = 0 kJ/mol ΔHf°(O2(g)) = 0 kJ/mol Assume all reactants and products are at standard state conditions.

asked Feb 3 in Chemical thermodynamics by SimonMcWilli (1.9k points)

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Calculate the standard enthalpy change for the reaction: 2H2(g) + O2(g) --> 2H2O(l)Given the following enthalpies of formation: ∆Hf°(H2O, l) = -285.8 kJ/mol ∆Hf°(H2, g) = -241.8 kJ/mol ∆Hf°(O2, g) = 0 kJ/mol

asked Feb 3 in Chemical thermodynamics by NevaBrooks50 (1.7k points)

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1 answer 89 views

Calculate the standard enthalpy change for the reaction: 2Fe(s) + 3/2 O2(g) -> Fe2O3(s) given that the standard enthalpy of formation for Fe2O3(s) is -824.2 kJ/mol and that of Fe(s) is 0 kJ/mol.

asked Feb 3 in Chemical thermodynamics by JackH2065356 (1.1k points)

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1 answer 50 views

Calculate the standard enthalpy change for the reaction: 2C2H5OH(l) + 9O2(g) -> 6CO2(g) + 8H2O(l) given that the standard enthalpy of formation for C2H5OH(l) is -278 kJ/mol, for CO2(g) is -394 kJ/mol and for H2O(l) is -286 kJ/mol.

asked Feb 3 in Chemical thermodynamics by IolaHolly818 (2.0k points)

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1 answer 49 views

Calculate the standard enthalpy change for the reaction: [Cu(H2O)6]2+(aq) + 2NH3(aq) → [Cu(NH3)4(H2O)2]2+(aq) + 4H2O(l)given the following information: ΔHf° [Cu(H2O)6]2+(aq) = -203.2 kJ/molΔHf° [Cu(NH3)4(H2O)2]2+(aq) = -368.5 kJ/molΔHf° H2O(l) = -285.8 kJ/molΔHf° NH3(aq) = -80.8 kJ/mol

asked Feb 3 in Chemical thermodynamics by LionelBonney (2.0k points)

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1 answer 65 views

Calculate the standard enthalpy change for the reaction: [Co(H2O)6]2+(aq) + 4Cl-(aq) → [CoCl4]2-(aq) + 6H2O(l) Given the following information:• ΔH°f of [Co(H2O)6]2+ is 32.3 kJ/mol • ΔH°f of [CoCl4]2- is -341.8 kJ/mol • ΔH°f of H2O(l) is -285.8 kJ/mol • The ΔH°f of Cl- is taken as zero

asked Feb 3 in Chemical thermodynamics by SommerBartos (1.8k points)

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1 answer 81 views

Calculate the standard enthalpy change for the reaction where 50 ml of 0.1 M hydrochloric acid reacts with 50 ml of 0.1 M sodium hydroxide solution. The temperature change observed during the reaction was 5°C and the specific heat capacity of the solution is 4.18 J/g°C.

asked Feb 3 in Chemical thermodynamics by PriscillaLaf (1.6k points)

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1 answer 73 views

Calculate the standard enthalpy change for the reaction where 3 moles of hydrogen gas react with 1 mole of nitrogen gas to form 2 moles of ammonia gas. Given the following thermochemical equation: N2(g) + 3 H2(g) → 2 NH3(g) ΔH° = −92.4 kJ/mol

asked Feb 3 in Chemical thermodynamics by MamieSanmigu (1.8k points)

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1 answer 80 views

Calculate the standard enthalpy change for the reaction where 250 mL of 2M HCl is mixed with 500 mL of 1M NaOH, assuming that the specific heat capacity of the resulting solution is 4.18 J/g°C and the density of the solution is 1.00 g/mL. (Hint: The balanced chemical equation for the reaction is HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l))

asked Feb 3 in Chemical thermodynamics by FerneSparks (2.3k points)

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1 answer 75 views

Calculate the standard enthalpy change for the reaction that occurs when 50 grams of ice at -10°C is heated to water at 25°C. The molar enthalpy of fusion of ice is 6.01 kJ/mol, and the specific heat capacity of water and ice are 4.184 J/g°C and 2.09 J/g°C, respectively. (Assume that the entire sample of ice is converted to water and that no heat is lost to the surroundings.)

asked Feb 3 in Chemical thermodynamics by SherrylIwz83 (2.0k points)

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1 answer 76 views

Calculate the standard enthalpy change for the reaction that occurs when 4.50 grams of magnesium oxide reacts with excess hydrochloric acid, given the following information:2HCl(aq) + MgO(s) → MgCl2(aq) + H2O(l) ΔH = -120.3 kJ/molMolar mass of MgO = 40.31 g/molRound your answer to two decimal places.

asked Feb 3 in Chemical thermodynamics by MoseSiler86 (1.8k points)

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1 answer 85 views

Calculate the standard enthalpy change for the reaction of the coordination compound Cu(NH3)4SO4 with excess NaOH to form Cu(OH)2(s), NH3(g), Na2SO4(aq), and H2O(l) at a constant pressure of 1 atm and a temperature of 25°C.

asked Feb 3 in Chemical thermodynamics by BeatriceJ11 (2.0k points)

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1 answer 58 views

Calculate the standard enthalpy change for the reaction of the combustion of liquid ethylene glycol $(C_2H_6O_2)$ when 500g of the compound is burned completely with excess oxygen gas, given the enthalpies of formation of $CO_2$ (-393.5 kJ/mol), $H_2O$ (-285.8 kJ/mol), and $C_2H_6O_2$ (-694.3 kJ/mol).

asked Feb 3 in Chemical thermodynamics by MagdaMeares (1.8k points)

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1 answer 109 views

Calculate the standard enthalpy change for the reaction of the combustion of 1 mole of liquid ethanol (C2H5OH) at 298K and 1 atm. The balanced chemical equation for the reaction is: C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(l)Given:ΔHf°(C2H5OH(l)) = -277.7 kJ/molΔHf°(CO2(g)) = -393.5 kJ/molΔHf°(H2O(l)) = -285.8 kJ/molΔHf°(O2(g)) = 0 kJ/mol

asked Feb 3 in Chemical thermodynamics by Joey98948916 (1.5k points)

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1 answer 58 views

Calculate the standard enthalpy change for the reaction of dissolving 5.00 grams of NaOH in 100.0 mL of water at 25°C, given that the heat absorbed by the solution is 11.76 kJ. (Assume the density of water is 1.00 g/mL and the heat capacity of the solution is the same as that of water.)

asked Feb 3 in Chemical thermodynamics by MckenzieWxs (1.6k points)

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1 answer 41 views

Calculate the standard enthalpy change for the reaction of cobalt(II) chloride hexahydrate with sodium carbonate to form cobalt(II) carbonate and sodium chloride according to the following balanced equation:CoCl2•6H2O + Na2CO3 → CoCO3 + 2 NaCl + 6 H2OGiven:- The enthalpy of hydration of cobalt(II) chloride is -787 kJ/mol.- The enthalpy of formation of sodium chloride is -411 kJ/mol.- The enthalpy of formation of cobalt(II) carbonate is -718 kJ/mol.- The enthalpy of formation of sodium carbonate is -1130 kJ/mol.

asked Feb 3 in Chemical thermodynamics by Rudy59684212 (1.8k points)

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1 answer 80 views

Calculate the standard enthalpy change for the reaction of 25.0 mL of 0.100 M HCl with 25.0 mL of 0.100 M NaOH at 25°C, given that the specific heat capacity of the solution is 4.18 J/g°C and the density of the solution is 1.00 g/mL. The balanced chemical equation for the reaction is:HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l) Assume the heat of the reaction is absorbed by the solution and the reaction has reached equilibrium.

asked Feb 3 in Chemical thermodynamics by FletaStepp73 (2.0k points)

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1 answer 101 views

Calculate the standard enthalpy change for the reaction of 2 moles of liquid ethanol with 3 moles of gaseous oxygen to form 2 moles of liquid acetic acid and 3 moles of gaseous water at 1 atm and 25°C, given the standard enthalpy of formation of ethanol, acetic acid, and water are -277.6 kJ/mol, -487.5 kJ/mol, and -285.8 kJ/mol respectively.

asked Feb 3 in Chemical thermodynamics by MaddisonMont (1.9k points)

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1 answer 84 views

Calculate the standard enthalpy change for the reaction of 2 moles of liquid ethanol (C2H5OH) reacting with 1 mole of gaseous oxygen (O2) to form 2 moles of gaseous carbon dioxide (CO2) and 3 moles of liquid water (H2O) at a temperature of 298K. Assume the reactants and products are at standard state conditions.

asked Feb 3 in Chemical thermodynamics by NorineFelici (1.8k points)

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1 answer 69 views

Calculate the standard enthalpy change for the reaction of [Co(H2O)6]Cl2 and NaOH using the following balanced chemical equation and given standard enthalpies of formation:[Co(H2O)6]Cl2 (aq) + 2NaOH (aq) → [Co(H2O)6](OH)2 (s) + 2NaCl (aq)ΔH°f [Co(H2O)6]Cl2 (aq) = -415.32 kJ/molΔH°f [Co(H2O)6](OH)2 (s) = -1276.24 kJ/molΔH°f NaCl (aq) = -407.33 kJ/mol

asked Feb 3 in Chemical thermodynamics by AnnetteYbc3 (1.6k points)

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