Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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- A scientist measures the standard enthalpy change for the following reaction to be 80.1 kJ : 3Fe,O3(s) + H2(g)2FE3O4(s) + H,O(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of Fe,O3(s) is kJ/mol.arrow_forwardCalculate the standard enthalpy of formation for glucose (C6H12O6) (in kJ/mol), given the following values: ΔH°combustion of glucose = -2800.8 kJ; ΔH°f, CO2 = -393.5 kJ/mol, ΔH°f, H2O = -285.8 kJ/mol.arrow_forwardTetrachloromethane, CCl4, is formed from methane and chlorine in the following reaction: CH4 (g) + 4 Cl₂ (g) → 4 HCl(g) + CCl4 (g) = Calculate A₁H, the enthalpy change for this reaction, using the enthalpies of formation of CO₂ (g), H₂O(l), and CCl4 (g), (▲ƒ H° = enthalpy changes for the following reactions: CH4 (g) + 2 O2(g) → 2 H₂O(l) + CO₂(g) ΔΗ° :-890.4 kJ/mol-rxn 2 HCl(g) → H₂(g) + Cl₂ (g) ΔΗ° +184.6 kJ/mol-rxn = ΔΗ° = Compound AfH (kJ/mol) H₂O(g) CO₂(g) -285.8 -393.5 kJ/mol-rxn - 95.98 kJ/mol), and thearrow_forward
- 4. Using ethanol as a fuel reduces greenhouse gas emissions by 40-50% when compared directly to gasoline. Calculate the enthalpy change for the combustion of ethanol, using the enthalpies of formation for C2H5OH), CO2(g), and H2Ou, located on the chart provided for the following reaction: C2H5OH(1) + 302(g) → 2CO2(g) + 3H2O1)arrow_forwardUsing the standard enthalpies of formation provided, calculate the energy change for the combustion of methanol: 2 CH3OH(l) + 3 O2(g) ⟶⟶ 2 CO2(g) + 4 H2O(g) Standard Enthalpies of Formation (kJ/mol)CH3OH(l) = -238.4 CO2(g) = -393.5 H2O(g) = -241.8arrow_forwardCalculate the enthalpy change for the following reaction 2H2S (g) + SO2 (g) → 3S (s) + 2H2O (g) from the following equations: (1) H2O(g) → H2(g) + 1/2 O2(g) Ho = 241.8 kJ (2) H2S(g) → H2(g) + S(s) Ho = 20.6 kJ ( 3) S(s) + O2(g) → SO2(g) Ho = - 296.8 kJarrow_forward
- A scientist measures the standard enthalpy change for the following reaction to be -208.6 kJ :CO(g) + 3 H2(g)CH4(g) + H2O(g)Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of CH4(g) is kJ/mol.arrow_forwardA scientist measures the standard enthalpy change for the following reaction to be 6.7 kJ : CO(g) + H,O(1)–CO;{g) + H2(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of CO(g) is kJ/mol.arrow_forward(incorrect) Calculate the standard enthalpy of reaction for the following reaction using the appropriate standard enthalpies of formation AH [SiCl4 (g)] = -657.0 kJ/mol; Other relevant thermodynamic quantities can be found in the appendix at the end of the textbook. SiO₂ (s) + 4 HCI (g) → SiCl4 (g) + 2 H₂O(g) -104.2 kJ 104.2 kJ -137.2 kJ -139.3 kJ (Your answer) 139.3 kJ (Correct answer)arrow_forward
- When 1.42 g of iron reacts with 1.80 g of chlorine, 3.22 g of iron(II) chloride (FeCl2, molar mass = 126.75 g/mol) and 6.8 kJ of heat is produced. What is the enthalpy change for the reaction when 1 mole of iron(II) chloride is produced? round to sig figsarrow_forwardA scientist measures the standard enthalpy change for the following reaction to be -2929.4 kJ :2C2H6(g) + 7 O2(g)4CO2(g) + 6 H2O(g)Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of CO2(g) is kJ/mol.arrow_forwardA scientist measures the standard enthalpy change for the following reaction to be -876.7 kJ :2NH3(g) + 3 N2O(g)4N2(g) + 3 H2O(g)Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of NH3(g) is kJ/mol.arrow_forward
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