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XSeaFCh triiS course Use the References to access important values if needed for this question. The...
8. Calculate AH°, AE°, and w for the following reaction using the data in Table 2 in Study Sheet No. 34 ( in kJ): нн H-C-C-H нн H н H2(g) нH Н(8) (g) 220 304 248 256 +9.67 -296.9 -395.2 +98.3 -300.4 -370.4 16 TABLE 2 Average Bond Energy (kJ/mol) С -Н C-O C-O C-C N=N O=O 413 C=C HOS 615 C N С-F С-СI Н-О 891 C C С-N 351 812 439 292 615- 436 329 803 356 C-N...
4. Use the bond enthalpies below and calculate the enthalpy of ethane combustion in kJ / mol. (AH° (H-H) = 436 kJ mol', AH° (C-H) = 435 kJ mol', AH° (0=0) = 498, AH° (CEO) = 732, AH (H-O) = 463] CzH6 (g) + 7/202 (g) - 2002 + 3H20 (g)
Review Topics References Use the References to access important values if needed for this question A scientist measures the standard enthalpy change for the following reaction to be -903.5 kJ: 2NH,(e) +3 N2O(g) 4N,(s) + 3 H2O(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of H,O() is kJ/mol. Submit Answer Retry Entire Group group attempts remaining
The answer is D, but I cannot figure out why.
Benzene, C6H6, has two resonance structures: H H -0 Η H CH H Given: 2 C6H6(g) + 15 O2(g) → 12 CO2(g) + 6 H2O(g); AHıxa = -6340 kJ Use the provided average bond dissociation enthalpies (D) to estimate the carbon-carbon bond dissociation enthalpy in benzene. Bond D(kJ/mol) A. 307 kJ/mol C-H 413 B. 446 kJ/mol C–C 348 C. 481 kJ/mol C=C 614 D. 508 kJ/mol O=0 498 E. 543...
Use the bond enthalpy data given to estimate the enthalpy of reaction for the addition of HBr to acetylene gas, C2H2 to form C2H4Br2 (with the condensed structural formula Br-CH2-CH2-Br ) at 25°C. BE(C-C) = 348 kJ/mol; BE(CC triple bond) = 839 kJ/mol; BE(C-H) = 413 kJ/mol; BE(H-Br) = 366 kJ/mol; BE(C-Br) = 276 kJ/mol -581 kJ/mol -4949 kJ/mol +155 kJ/mol -887 kJ/mol +887 kJ/mol
Use the molar bond enthalpy data in the table to estimate the Average molar bond enthalpies. (Hd value of AHn for the equation kJ mol Bond Воnd kJ mol CH)+HBrig)C,H,Brig) O-H 464 CEN 890 O-O The bonding in the molecules is shown. 142 N-H 390 C-O 351 N-N 159 H Br O-O 502 N-N 418 H-Br NEN C-O 730 945 C-C 347 F-F 155 Enter numeric value С-С 615 CI-CI 243 AH = C C Br-Br I kJ 811 192...
13. (12 pts) Using the following bond dissociation energies, estimate the enthalpy of the reaction for the reaction between acetylene and hydroiodic acid to generate 1,2-diiodoethane. нн H-CEC-H 2 H- Bond Bond Enthalpy (kJ/mol) Bond Bond Enthalpy (kJ/mol) 839 C-H 413 С-С сс 348 C-I 240 Н-1 299 7
References Use the References to access important values if needed for this question. A scientist measures the standard enthalpy change for the following reaction to be -87.1 kJ : 2HBr(g) + Cl2(g)—>2HCl(g) + Br2(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of HCl(g) is kJ/mol. Submit Answer
References Use the References to access important values If needed for this question. A scientist measures the standard enthalpy change for the following reaction to be -913.8 kJ : Fe2O3(s) + 2 Al(s) A12O3(s) + 2 Fe(s) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of AlzO3(s) is kJ/mol. Submit Answer
Hint L Glve Up? Check Answer 1879/2500 Resources mment Score: tion 23 of 25 > Use the molar bond enthalpy data in the table to estimate the Average molar bond enthalpies (Hbond) value of AH for the equation kJ-mol kJ-mol Bond Bond cCl,(g)+2F,(g)-CF (g) +2 C1, (g) 464 CEN 890 О-н 390 N-H 142 O-O The bonding in the molecules is shown. 351 N-N 159 C-O 502 N N 418 O-O C-C + 945 N N 730 C-O C-C FF...