The following table contains some standard enthalpies of formation, AH, at298 K.Substancediamondgraphitecarbontetrachloridecarbontetrachloridecarbontetrafluoridemethanecarbonmonoxidecarbondioxidechlorine gas Cl₂ (g)hydrochloricacidfluorine gashydrofluoricacidhydrogenoxygenwaterwaterhydrogenperoxidehydrogenperoxideΔΗ(kJ/mol)1.88FormulaC(s)C(s) 0CCl4 (g) -106.7CC14 (1)-139.3CF4 (g)CH4 (g)-74.8CO(g) -110.5-679.9CO₂(g) -393.50HCl(g) -92.30F2 (g) 0HF (g) -268.61H₂(g) 0O2 (g) 0H₂O(g) -241.82H₂O(1) -285.83H₂O2(g) -136.10H₂O2 (1) -187.8 It is interesting to compare the "fuel value" of a hydrocarbon in a hypothetical world where oxygen is not the combustionagent. The enthalpy of formation of CF4 (g) is -679.9 kJ/mol.Calculate AH for the following reaction:CH4 (9) +202 (g) →CO2 (g) + 2H₂O(g)Express your answer using three significant figures.VE ΑΣΦ?Calculate AH for the following reaction:CH4 (9) + 4F2 (g) →CF4 (9) + 4HF (g)Express your answer using three significant figures.VE ΑΣΦ?kJkJ

Recall the given reaction, CH4 g + 2 O2 g → CO2 g + 2 H2O g…

It is interesting to compare the "fuel value" of a hydrocarbon in a hypothetical world where oxygen is not the combustion agent. The enthalpy of formation of CF4 (g) is -679.9 kJ/mol. Calculate AH for the following reaction: CH4 (g) +202 (g) →CO₂ (g) + 2H₂O(g) Express your answer using three significant figures. VO ΑΣΦ ? Calculate AH for the following reaction: CH4 (9) + 4F2 (g) →CF4 (9) + 4HF (9) Express your answer using three significant figures. 15| ΑΣΦ ? kJ kJ

It is interesting to compare the "fuel value" of a hydrocarbon in a hypothetical world where oxygen is not the combustion agent. The enthalpy of formation of CF4 (g) is -679.9 kJ/mol. Calculate AH for the following reaction: CH4 (g) +202 (g) →CO₂ (g) + 2H₂O(g) Express your answer using three significant figures. VO ΑΣΦ ? Calculate AH for the following reaction: CH4 (9) + 4F2 (g) →CF4 (9) + 4HF (9) Express your answer using three significant figures. 15| ΑΣΦ ? kJ kJ

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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Measurements show that the energy of a mixture of gaseous reactants decreases by 178. kJ during certain chemical reaction, which is carried out at a constant pressure. Furthermore, by carefully monitoring the volume change it is determined that -163. kJ of work is done on the mixture during the reaction. Calculate the change in enthalpy of the gas mixture during the reaction. Round your answer to 2 significant digits. Is the reaction exothermic or endothermic? kJ exothermic endothermic x10 X
According to the equation below, do the products have stronger or weaker bonds than the reactants? C (s) + 2H (g) → CH4 (g), ΔHrxn = -74.86 kJ/mol
Using the general properties of reaction enthalpy A chemist measures the enthalpy change AH during the following reaction: 8 SO,(g) + 16 H,S(9)→3 Sg(s) + 16 H,O(1) AH=-1863. kJ Use this information to complete the table below. Round each of your answers to the nearest kJ/mol. reaction ΔΗ 16S0,(g) + 32H,s(s) → 6S,(s) + 32H,0(1) 98,(s) + 48H,0(1) → 24S0,(g) + 48H,S(3) 3s,() + 16H,0() 880,g) + 16H,S (g) O kJ Explanation Check
What is the enthalpy change for the first reaction? Fe2O3(s) → 2Fe(s) + 3/2O2(g) ΔH = 4Fe(s) + 3O2(g) → 2Fe2O3 (s) ΔH = -1,652 kJ
enon 19 of 23 For the chemical reaction Ca (s) + % O2 (g) What is the enthalpy for the reaction 2 CaO (s) → 2 Ca (s) + O2 (g)? CaO (s) AH° = -635 kJ/mol.
A scientist measures the standard enthalpy change for the following reaction to be -2910.6 kJ: 2C2H6(g)7 02(g)- 4CO2(g)6 H20(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of H2O(g) is kJ/mol Submit Answer Retry Entire Group 9 more group attempts remaining
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Determine the enthalpy for the following reaction, given A# (NH3(g)) = -46.1 kJ/mol, AH (NO(g) = +90.3 kJ/mol, and A (H20(g)) = -241.8 kJ/mol. 4NH3(g) + 502(g) →4NO(g) + 6H20(g) AHrxn = ? kJ -1274 kJ/mol -1,996 kJ/mol +1,274 kJ/mol -905.2 kJ/mol -105.4 kJ/mol
The standard enthalpy change for the following reaction is 450 kJ at 298 K Cu(OH)2(s) → Cu(s) + O2(g) + H2(g) AH° = 450 kJ What is the standard enthalpy change for this reaction at 298 K? Cu(s) + O2(g) + H2(g) → Cu(OH)2(s) kJ
The combustion of 0.1566 g benzoic acid increases the temperature of a bomb calorimeter by 2.51°C. Calculate the heat capacity of this calorimeter. (The energy released by combustion of benzoic acid is 26.42 kJ/g.) Heat capacity = kJ/°C A 0.2195-g sample of vanillin (Cg H3 O3) is then burned in the same calorimeter, and the temperature increases by 3.21°C. What is the energy of combustion per gram of vanillin? Energy = kJ/g Per mole of vanillin? Energy = kJ/mol
Using the standard enthalpies of formation in the picture, calculate ΔHº for the following reactions:a) 2H2O2 (l) → 2H2O (l) + O2 (g) b) CH4 (g) + Cl2 (g) → CH3Cl (g) + HCl (g) c) HCl (g) + NaOH (s) → NaCl (s) + H2O (l)
Part C Calculate the enthalpy change for the thermite reaction: 2Al(s) + Fe2 O3 (s)→2FE(s) + Al203 (s), AH° rxn = -850 kJ when 12.0 mol of Al undergoes the reaction with a stoichiometrically equivalent amount of Fe2O3. Express your answer to three significant figures and include the appropriate units.