Calculate the bond dissociation energy for the breaking of all the bonds in a mole of methane, CH4. Express your answer to four significant figures and include the appropriate units. > View Available Hint(s)

MISSED THIS? Read Section 7.6 (Pages 281- 284), Watch IWE 7.7 View Available Hint(s) Nitromethane (CH,NO2) burns in air to produce significant amounts of heat via the following reaction Hint 1. Calculate the number of moles of nitromethane 2CH,NO, (1) +O2(g)→ 2CO2(g) +3H,O(1) + N2(g) The value of AH is related to the balanced chemical equation by the number of moles of nitromethane. Calculate the number of moles of nitromethane in a 2.73-kg sample. AHn -1418 kJ Express your answer in moles. mol CH, NO2 44.72 Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining Convert the mass of nitromethane from kg to g. Then use the molar mass of nitromethane as a conversion factor to obtain a value in mol HA Value Units = b

Use the molar bond enthalpy data in the table to estimate Average molar bond enthalpies. (Hpond) the value of AHn for the equation Bond kJ - mol-1 Bond kJ - mol-1 CCI, (g) + 2F, (g) CF,(g) + 2Cl, (g) O-H 464 C=N 890 The bonding in the molecules is shown. 0-0 142 N-H 390 С-О 351 N-N 159 CICI O=0 502 N=N 418 + C CI C=0 730 N=N 945 F-F С-С 347 F-F 155 C=C 615 Cl-CI 243 C=C 811 Br-Br 192 С-Н 414 Н-Н 435 C-F 439 Н-F 565 C-CI 331 Н-С 431 C-Br 276 Н-Br 368 C-N 293 H-S 364 C=N 615 S-S 225

A scientist measures the standard enthalpy change for this reaction to be 296.0 kJ/mol: H₂S(g) + 2 H₂O(l) 3H₂(g) + SO₂(g) Based on this value and the standard formation enthalpies for the other substances, the standard formation enthalpy of H₂S(g) is kJ/mol. Submit Answer Retry Entire Group 1 more group attempt remaining

6. Estimate the enthalpy change for the following reaction. Show all your steps to get full credit. Include your units along with your numeric answer 2H2 (g) + N2 (g) à 2NH3 (g)

Use Table 9.4 to calculate an approximate enthalpy or heat of reaction for the combustion of one mole of methane gas (CH4) to form gaseous H₂O and CO₂. What Volume (in L) of methane is needed to produce 2715 kJ of heat for methane gas at 33 °C and 9.50 atm pressure? Hint given in feedback

General Chemistry 4th Edition McQuarrie • Rock Gallogly University Science Books presented by Macmillan Learning Bond kJ . mol-1 Bond kJ · mol-1 Use the molar bond enthalpy data in the table to estimate the value of AHan for the equation. 0-H 464 C=N 890 0-0 142 N-H 390 NH, (g) + 20,(g) → HNO,(g) + H,O(g) С-О 351 N-O 201 The bonding in the molecules is shown. O=0 502 N=N 418 C=0 730 N=O 607 H + С-С 347 F-F 155 С-С 615 Cl–Cl 243 C=C 811 Br-Br 192 С-Н 414 Н-Н 435 С-F 439 Н-F 565 C-CI 331 H-C1 431 С-Br 276 H-Br 368 С-N 293 H-S 364 C=N 615 S-S 225 kJ-mol-! Question Source: McQuarrie, Rock, And Gallogly 4e - General Chemsitry | Publisher: Universi

eats of formation given in the table: ! Formula C₂H2(g) 226.7 NH3(g) -46.19 C6H6(1) 49.0 ate CaCo3(s) -1207.1 -635.5 CaO(s) CO2(g) AH f (kJ/mol) ide CO(g) C(s) -393.5 -110.5 1.88 C₂H6(8) -84.68 C₂H5 OH (1) -277.7 C₂H4(8) 52.30 C6H12O6 -1273 Substance OA Hrxn = 327.6 kJ/mol OA Hrxn = -163.8 kJ/mol OAHrxn = -327.6 kJ/mol OA Hrxn = 56.1 kJ/mol OA Hrxn = 163.8 kJ/mol Hydrogen chloride Hydrogen fluoride Hydrogen iodide Methane Methanol Propane Silver chloride Sodium bicarbonate Sodium carbonate Sodium chloride Sucrose Water (s) nide HBr(g) -36.23 Water vapor :a, determine the enthalpy change for the reaction: 2 CH4(g) + O₂(g) 2 CH3OH(e) Formula AH f (kJ/mol) HCI(g) HF(g) HI(g) 25.9 CH4(g) -74.80 |CH3 ОН -238.6 (1) C3H8(g) -103.85 -127.0 AgCl(s) NaHCO3 (s) C12H22O11130.9 (s) NaCl -92.30 -268.60 -947.7 -410.9 C12H22O11221 (s) H₂O(l) -285.8 H₂O(g) -241.8

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