iii. C6H1206(s)→6C(diamond)+6H2(g)+302(g)b. The standard enthalpy change for the reaction CaCO:(s) → CaO(s) + CO2(g) is178.1 kJ. Use Table 5.3 to calculate the standard enthalpy of formation ofCaCO:(s).TABLE 5.3 · Standard Enthalpies of Formation, AH, at 298 KSubstanceFormulaAH} (kl/mol)SubstanceFormulaAHF (kJ/mol)Hydrogen chlorideHydrogen fluorideHydrogen iodideAcetyleneHC(g)HF(g)226.7-92.30AmmoniaNH3(g)-46.19-268.60BenzeneCH(1)49.0HI(g)25.9Calcium carbonateCaCO,(s)-1207.1MethaneCH,(g)-74.80Calcium oxideCaO(s)-635.5MethanolCH,OH()-238.6Carbon dioxideCO:(g)-393.5PropaneC,Hlg)-103.85Carbon monoxideCOlg)-110.5Silver chlorideAgCI(s)-127.0DiamondC(s)1.88Sodium bicarbonateNAHCO,(s)-947.7EthaneC,Holg)C;H;OH()-84.68Sodium carbonateNa,CO,(s)-1130.9Ethanol-277.7Sodium chlorideNaCl(s)-410.9EthyleneSucroseCHlg)CH120,(s)52.30-2221Glucose-1273WaterH,O()-285.8Hydrogen bromideHBr(g)-36.23Water vaporH;O(g)-241.82012 Pearon Bducation, Inc 5. Enthalpy of formationa. For which of these reactions at 25 °C does the enthalpy change represent astandard enthalpy of formation? For each that does not, what changes are neededto make it an equation whose AH is an enthalpy of formation?i. 2Na(s)+02(g)→Na20(s)ii. 2K(1)+Cl2(g)→2KCI(s)

a) Standard enthalpy of formation is the change in enthalpy when one mole of compound is formed from…

5. Enthalpy of formation a. For which of these reactions at 25 °C does the enthalpy change represent a standard enthalpy of formation? For each that does not, what changes are needed to make it an equation whose AH is an enthalpy of formation? i. 2Na(s)+÷02(g)¬Na20(s) ii. 2K(l)+Cl½(g)→2KCI(s)

5. Enthalpy of formation a. For which of these reactions at 25 °C does the enthalpy change represent a standard enthalpy of formation? For each that does not, what changes are needed to make it an equation whose AH is an enthalpy of formation? i. 2Na(s)+÷02(g)¬Na20(s) ii. 2K(l)+Cl½(g)→2KCI(s)

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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A scientist measures the standard enthalpy change for the following reaction to be -1057.0 kJ: 2H2S(g) + 3 02(g) 2H20(g) + 2 S02(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of H20(g) is kJ/mol.
5. Nitric oxide gas, NO(g), can be oxidized in air to produce nitrogen dioxide gas, NO,(g): 2 NO(g) + 0,(g) –2 NO,(g) Determine the enthalpy change for this reaction using any of these thermochemical equations: m 0,(g)20(g) NO(g) + 0,(g) → NO,(g) + 0,(g) AH = -199 kJ 20,(g)→3 0,(g) AH = +495 k] %3D AH = -427k]
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You mix 125 mL of 0.210 M CsOH with 50.0 mL of 0.525 M HF in a coffee-cup calorimeter, and the temperature of both solutions rises from 21.30 °C before mixing to 23.73 °C after the reaction. CsOH(aq) + HF (aq) → CsF(aq) + H₂O(l) What is the enthalpy of reaction per mole of CsOH? Assume the densities of the solutions are all 1.00 g/mL, and the specific heat capacities of the solutions are 4.2 J/g. K. Enthalpy of reaction = kJ/mol
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