| Quiz | Bond energy calculations |
|---|---|
| Name | |
| Result | PASSED |
| Score | 12 / 14 (85.7%) |
| Passing score | 11.2 |
| Quiz took | 8 min 16 sec |
| Quiz finished at | 2022-03-15 14:42:10 |
Exothermic reactions have
Endothermic reactions have
If the energy change is negative, the reaction is
If the energy change is positive, the reaction is
The equation below shows the reaction between iodine and chlorine gas. I2 + Cl2 → 2ICl I-I + Cl-Cl → 2I-Cl Calculate the energy change using the bond energies provided. I-I is 151 kJ/mol Cl-Cl is 242 kJ/mol I-Cl is 208 kJ/mol
The equation below shows the reaction between nitrogen and hydrogen to form ammonia. N2 + 3H2 → 2NH3 Calculate the energy change using the bond energies provided. N≡N is 941 kJ/mol H-H is 436 kJ/mol N-H is 391 kJ/mol
Calculate the energy change using the bond energies provided. Hydrogen + Chlorine → Hydrogen Chloride H2(g) + Cl2(g) → 2HCl(g) H–H + Cl–Cl → H–Cl + H–Cl Bond energies: H–H is 436 kJ/mol Cl–Cl is 242 kJ/mol H–Cl is 431 kJ/mol
Calculate the energy change using the bond energies provided. Hydrogen Bromide → Hydrogen + Bromine 2HBr(g) → H2(g) + Br2(g) H–Br + H–Br → H–H + Br–Br Bond energies: H–Br is 366 kJ/mol H–H is 436 kJ/mol Br–Br is 193 kJ/mol
The equation below shows the reaction between methane and bromine. CH4 + Br2 → CH3Br + HBr Calculate the energy change using the bond energies provided. C-H is 413 kJ/mol Br-Br is 193 kJ/mol H-Br is 366 kJ/mol C-Br is 276 kJ/mol
The equation below shows the combustion of propane. C3H8 + 5O2 → 3CO2 + 4H2O Calculate the energy change using the bond energies provided. C-H is 413 kJ/mol C-C is 348 kJ/mol C=O is 799 kJ/mol O-H is 463 kJ/mol O=O is 495 kJ/mol
Calculate the energy change using the bond energies provided. Nitrogen + Hydrogen → Ammonia N2(g) + 3H2(g) → 2NH3(g) Bond energies: N≡N is 944 kJ/mol H–H is 436 kJ/mol N–H is 388 kJ/mol
Hydrogen and chlorine react to form hydrogen chloride gas: H−H + Cl−Cl → 2 × (H−Cl) Use the bond energies in the table to calculate the energy change for this reaction. H−H is 436 kJ/mol Cl−Cl is 243 kJ/mol H−Cl is 432 kJ/mol
Hydrogen bromide decomposes to form hydrogen and bromine: 2 × (H−Br) → H−H + Br−Br Use the bond energies in the table to calculate the energy change for this reaction. H−Br is 366 kJ/mol H−H is 436 kJ/mol Br−Br is 193 kJ/mol
Hydrogen reacts with oxygen to form water: 2 × (H−H) + O=O → 2 × (H-O-H) Use the bond energies below to calculate the energy change for this reaction. H−H is 436 kJ/mol O=O is 498 kJ/mol O-H is 464 kJ/mol