Use bond enthalpies in the table below to estimate AH for each of the following reactions. I Review Constants Periodic Table Part A Average bond enthalpy (kJ/mol) C-H: 413 N-H: 391 O-H: 463 F-F: 155 Br Br C-C: 348 N-N: 163 O-0: 146 Br-C-H + Cl-Cl - Br-C-Cl + Cl-H C=C: 614 N-O: 201 0=0: 495 Cl-F: 253 C-N: 293 N-F: 272 0-F: 190 Cl-Cl: 242 Br Br C-0: 358 N-Cl: 200 O-Cl: 203 Br-F: 237 234 Br-Cl: 218 Br-Br: 193 C=0: 799 N-Br: 243 0-I: Express your answer in kilojoules to three significant figures. C-F: 485 H-H: 436 C-Cl: 328 H-F: 567 C-Br: 276 H-Cl: 431 I-Cl: 208 kJ 202.3 240 H-Br: 366 H-I: 299 I-Br: 175 ΔΗ- C-I: I-I: 151 Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Part B H. H-C-H +2 0=0- 0=C=0+ 2 H-O-H

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### Understanding Bond Enthalpies

**Use bond enthalpies in the table below to estimate ΔH for each of the following reactions.**

#### Average Bond Enthalpies (kJ/mol)
| Bond | Enthalpy (kJ/mol) | Bond | Enthalpy (kJ/mol) | Bond | Enthalpy (kJ/mol) |
|------|-------------------|------|-------------------|------|-------------------|
| C–H  | 413               | N–H  | 391               | O–H  | 463               |
| C≡C  | 848               | N–N  | 163               | O=O  | 146               |
| C=C  | 614               | N≡N  | 201               | O=O  | 495               |
| C=O  | 799               | Cl–Cl| 243               | O–O  | 146               |
| C≡N  | 891               | Cl–F | 253               | O–Cl | 203               |
| C–Cl | 328               | H–F  | 567               | I–Cl | 208               |
| C–Br | 276               | H–Cl | 431               | I–Br | 175               |
| C–I  | 240               | H–Br | 366               | I–I  | 151               |
| H–I  | 299               | H–O  | 463               | Br–Br| 193               |

### Example Reaction

**Part A:**

Reactants: ![bromomethane](https://www.example.com/br-c-h) and chlorine (![Cl\_2](https://www.example.com/Cl\_2))

Products: ![dibromomethane](https://www.example.com/br-br), hydrogen chloride (![HCl](https://www.example.com/HCl))

Product Diagram: 
Br-C-H + Cl-Cl -> Br-C-Cl + H-Cl

**Express your answer in kilojoules to three significant figures.**

ΔH = -202.3 kJ

(Correct answer not provided)

### Graph Explanation

**Part B:**

Reactants: ethane (![C_2H_2](https://www.example.com/C_2H_2))
Transcribed Image Text:### Understanding Bond Enthalpies **Use bond enthalpies in the table below to estimate ΔH for each of the following reactions.** #### Average Bond Enthalpies (kJ/mol) | Bond | Enthalpy (kJ/mol) | Bond | Enthalpy (kJ/mol) | Bond | Enthalpy (kJ/mol) | |------|-------------------|------|-------------------|------|-------------------| | C–H | 413 | N–H | 391 | O–H | 463 | | C≡C | 848 | N–N | 163 | O=O | 146 | | C=C | 614 | N≡N | 201 | O=O | 495 | | C=O | 799 | Cl–Cl| 243 | O–O | 146 | | C≡N | 891 | Cl–F | 253 | O–Cl | 203 | | C–Cl | 328 | H–F | 567 | I–Cl | 208 | | C–Br | 276 | H–Cl | 431 | I–Br | 175 | | C–I | 240 | H–Br | 366 | I–I | 151 | | H–I | 299 | H–O | 463 | Br–Br| 193 | ### Example Reaction **Part A:** Reactants: ![bromomethane](https://www.example.com/br-c-h) and chlorine (![Cl\_2](https://www.example.com/Cl\_2)) Products: ![dibromomethane](https://www.example.com/br-br), hydrogen chloride (![HCl](https://www.example.com/HCl)) Product Diagram: Br-C-H + Cl-Cl -> Br-C-Cl + H-Cl **Express your answer in kilojoules to three significant figures.** ΔH = -202.3 kJ (Correct answer not provided) ### Graph Explanation **Part B:** Reactants: ethane (![C_2H_2](https://www.example.com/C_2H_2))
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