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Calculate the standard enthalpy of formation for hydrogen peroxide (H2O2) at 298 K, given that the standard enthalpy change of formation for water (H2O) is -285.8 kJ/mol and the standard enthalpy change of formation for oxygen gas (O2) is 0 kJ/mol.

asked Feb 3 in Chemical thermodynamics by HamishChappe (330 points)

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Calculate the standard enthalpy of formation for carbon dioxide (CO2) given the following information: ΔHf° of CO = -26.4 kJ/mol, ΔHf° of O2 = 0 kJ/mol, and ΔH°rxn for the combustion of carbon to form CO2 is -393.5 kJ/mol.

asked Feb 3 in Chemical thermodynamics by MaryjoMcReyn (450 points)

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Calculate the standard enthalpy of formation (ΔH°f) of methane (CH4) given the following data: 2H2(g) + O2(g) → 2H2O(l) ΔH°rxn = -572 kJ/mol C(graphite) + O2(g) → CO2(g) ΔH°rxn = -394 kJ/mol Note: The enthalpy of formation of an element in its standard state is zero (0).

asked Feb 3 in ThermoChemistry by PiperDelano3 (410 points)

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Calculate the standard enthalpy of formation (ΔH°f) of carbon dioxide (CO2) at 25°C given the following data:CO(g) + 1/2 O2(g) → CO2(g) ΔH° = -283.3 kJ/molC(s) + O2(g) → CO2(g) ΔH° = -393.5 kJ/molΔH°f (C(s)) = 0 kJ/molΔH°f (O2(g)) = 0 kJ/mol

asked Feb 3 in ThermoChemistry by AJBJacquie14 (250 points)

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Calculate the standard enthalpy of formation (ΔH°f) for butane (C4H10) given the following data:ΔH°f (kJ/mol)C(s) 0H2(g) 0C2H6(g) -84.7C3H8(g) -103.8Note: You may assume that butane undergoes complete combustion to form CO2(g) and H2O(l) and that the standard enthalpies of combustion for C4H10, CO2, and H2O are -2877.2, -393.5, and -285.8 kJ/mol, respectively.

asked Feb 3 in Chemical thermodynamics by YongWhitis24 (410 points)

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Calculate the standard enthalpy of formation (∆Hf) of water (H2O) given the following information: 2H2(g) + O2(g) → 2H2O(l); ∆H = -572 kJ/mol and the standard enthalpy of formation of O2 is 0 kJ/mol.

asked Feb 3 in ThermoChemistry by JonnieThorne (230 points)

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Calculate the standard enthalpy change of the reaction of 2 moles of carbon monoxide and 1 mole of oxygen gas to form 2 moles of carbon dioxide gas, given that the enthalpy change for the decomposition of 2 moles of carbon dioxide to 2 moles of carbon monoxide and 1 mole of oxygen gas is -566 kJ/mol, and the enthalpy change for the combustion of 1 mole of carbon to form carbon dioxide gas is -394 kJ/mol. Use Hess's Law to solve the problem.

asked Feb 3 in Chemical reactions by CathleenBui3 (450 points)

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Calculate the standard enthalpy change of the reaction NH3(g) + 2O2(g) → NO2(g) + 3H2O(l) at 25°C, given that the standard enthalpies of formation of NH3(g), O2(g), NO2(g) and H2O(l) are -46.11 kJ/mol, 0 kJ/mol, 33.18 kJ/mol and -285.8 kJ/mol, respectively.

asked Feb 3 in Quantum Chemistry by Jewell856884 (170 points)

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1 answer 29 views

Calculate the standard enthalpy change of the reaction between hydrogen gas and chlorine gas to form hydrogen chloride gas using the bond enthalpy values for H-H, Cl-Cl and H-Cl bonds.

asked Feb 3 in Quantum Chemistry by BerryPalmer6 (270 points)

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Calculate the standard enthalpy change of the reaction between 100.0 mL of 0.100 M HCl(aq) and 100.0 mL of 0.100 M NaOH(aq) at 25°C, given that the specific heat capacity of the final solution is 4.18 J/g·°C and that the density of the final solution is 1.00 g/mL.

asked Feb 3 in Chemical thermodynamics by DebRuffin757 (330 points)

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Calculate the standard enthalpy change of the reaction below at 298K.Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g)Given the following standard enthalpies of formation (ΔHf°):ΔHf°[Fe2O3(s)] = -824.2 kJ/molΔHf°[Fe(s)] = 0 kJ/molΔHf°[CO(g)] = -110.5 kJ/molΔHf°[CO2(g)] = -393.5 kJ/mol. Also, calculate the change in standard entropy of the system (ΔS°) and determine whether the reaction is spontaneous or not.

asked Feb 3 in Inorganic Chemistry by ShayPicot468 (250 points)

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Calculate the standard enthalpy change of the precipitation reaction between 50.0 mL of 0.100 M Pb(NO3)2 and excess 0.100 M NaCl solution at 25°C given that the reaction is Pb(NO3)2 (aq) + 2NaCl (aq) → PbCl2(s) + 2NaNO3 (aq) and the enthalpy of formation of NaNO3 (aq) and NaCl (aq) are -467.7 kJ/mol and -411.2 kJ/mol respectively.

asked Feb 3 in Chemical thermodynamics by EnriqueValle (370 points)

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1 answer 26 views

Calculate the standard enthalpy change of the oxidation of hydrogen gas (H2) to form water (H2O) at 298 K, given that the standard enthalpy of formation of water is -285.8 kJ/mol and the bond dissociation enthalpy of the H-H bond is 436 kJ/mol.

asked Feb 3 in ThermoChemistry by HassieHazon (350 points)

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Calculate the standard enthalpy change of the formation reaction for carbon dioxide (CO2) given the standard enthalpies of formation for carbon monoxide (CO) and oxygen gas (O2) as -110.5 kJ/mol and -249.2 kJ/mol, respectively.

asked Feb 3 in Chemical thermodynamics by LKVVirgie254 (270 points)

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Calculate the standard enthalpy change of the formation of water (H2O) given the following data:- Standard enthalpy of formation of hydrogen gas (H2) = 0 kJ/mol- Standard enthalpy of formation of oxygen gas (O2) = 0 kJ/mol- Standard enthalpy of formation of water vapor (H2O(g)) = -241.8 kJ/mol

asked Feb 3 in Chemical thermodynamics by TessaGoodiss (490 points)

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1 answer 25 views

Calculate the standard enthalpy change of the following reduction reaction if the standard enthalpy of formation of FeO is -272.0 kJ/mol and that of Fe is 0 kJ/mol.FeO(s) + H2(g) → Fe(s) + H2O(l)

asked Feb 3 in ThermoChemistry by BXQWarren060 (430 points)

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Calculate the standard enthalpy change of the following chemical reaction at 298 K given the following bond energies: 2H2(g) + O2(g) --> 2H2O(l) Bond energies: H-H: 432 kJ/mol O=O: 498 kJ/mol O-H: 464 kJ/mol

asked Feb 3 in Physical Chemistry by VonThurston4 (370 points)

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Calculate the standard enthalpy change of the dissolution reaction for 5.00 g of NaOH in 100 mL of water, given the molar heat of solution of NaOH as -44.5 kJ/mol.

asked Feb 3 in Chemical thermodynamics by MichaelaRick (370 points)

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1 answer 33 views

Calculate the standard enthalpy change of reduction for the reaction: Fe2O3(s) + 3H2(g) -> 2Fe(s) + 3H2O(l) Given: Standard enthalpy of formation (ΔHf°) of Fe2O3(s) = -822 kJ/mol Standard enthalpy of formation (ΔHf°) of H2O(l) = -286 kJ/mol Standard enthalpy of fusion (ΔHfus) of Fe(s) = 13.81 kJ/mol Standard enthalpy of vaporization (ΔHvap) of H2(g) = 0.449 kJ/mol Standard enthalpy of formation (ΔHf°) of H2(g) = 0 kJ/mol

asked Feb 3 in ThermoChemistry by Cole41H70743 (290 points)

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Calculate the standard enthalpy change of reduction for the following reaction: Cu2+(aq) + 2e- -> Cu(s) Given that the standard electrode potential of Cu2+(aq)/Cu(s) is +0.34 V and the standard electrode potential of Ag+(aq)/Ag(s) is +0.80 V.

asked Feb 3 in ThermoChemistry by MarianaHerit (450 points)

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