Hi! Can someone answer Learning task 4, no. 2? Thanks! 2C (graphite) +2 H2 (g) AH = XXXXXXXXXXkJ/mol2 C(graphite) + 3 H2 (g) –> C2H6 (g) AH = XXXXXXXXXXkJ/molC2H4 (g) + H2 (g) –> C2H6 (g) AH =...

Hi! Can someone answer Learning task 4, no. 2? Thanks!


Extracted text: Applying Hess's Law C2H4 (g) -> 2C (graphite) +2 H2 (g) AH = - 52.3 kJ/mol 2 C(graphite) + 3 H2 (g) –> C2H6 (g) AH = - 84.5 kJ/mol C2H4 (g) + H2 (g) –> C2H6 (g) AH = - 136.8 kJ/mol Learning Task 4: Show your solution. 1. Calculate AH for the reaction 4 NH3 (g) + 5 02 (g) → 4 NO (g) + 6 H2O (g), from the following data. AH = -180.5 kJ AH = -91.8 kJ N2 (g) + 02 (g) → 2 NO (g) N2 (g) +3 H2 (g)→2 NH3 (g) 2 H2 (g) + 02 (g) → 2 H2O (g) AH = -483.6 kJ 2. Find OH° for the reaction 2H2(g) + 2C(s) + 02(g) C2H5OH(I), using the following thermochemical data. C2H5OH (I) + 2 02 (g) 2 CO2 (g) + 2 H2O (1) C (s) + 02 (g)→ CO2 (g) H2 (g) + ½ 02 (g) H2O (1) AH = -875 kJ AH = -394.51 kJ AH = -285.8 kJ 3. Calculate AH for the reaction CH4 (g) + NH3 (g) HCN (g) +3 H2 (g), given: N2 (g) +3 H2 (g) → 2 NH3 (g) C (s) + 2 H2 (g) H2 (g) + 2 C (s) + N2 (g) →2 HCN (g) AH = +270.3 kJ AH = -91.8 kJ CH4 (g) AH = -74.9 kJ 4. Calculate DH for the reaction 2 Al (s) + 3 C12 (g)→2 AICI3 (s) from the following data. 2 Al (s) + 6 HCI (aq) 2 AIC13 (aq) + 3 H2 (g) AH = -1049. kJ HCI (g)HCI (aq) H2 (g) + C12 (g) → 2 HCI (g) AICI3 (s) AH = -74.8 kJ/mole AH = -1845. kJ AICI3 (aq) AH = -323. kJ/mole