2. Video on Energetics and Enthalpy CalculationEnthalpy of reaction using combustion dataEnthalpy of reaction using combustion dataEnthalpy of reaction using formation dataEnthalpy of reaction using formation data 3. Basic Rules for H Enthalpy changes calculations1 Total amt energy released/absorbed is to number of moles of reactants2 H for reverse reaction is EQUAL in magnitude but opposite in sign to H forward3 Standard condition for measuring STANDARD ENTHALPY CHANGE, H4 Unit for H is KJ mol -1 4. Basic Rules for H Enthalpy changes calculationsTemp and Heat56 Enthalpy change H measured using a calorimeter7Specific heat capacity for a substance water ( 4.18J g-1K-1) 5. Standard Enthalpy Change of Formation for a reaction, H f 6. Standard Enthalpy Change of reaction, H fH f = Amt of energy absorbed or released when ONE mole of compound formed fromIts standard state from its constituents in their standard statesEx : NaCI (s) + 1/2CI2 (g) NaCI (s)Notes on H f 7. Standard Enthalpy Change of reaction, H fH f = Amt of energy absorbed or released when ONE mole of compound formed fromIts standard state from its constituents in their standard statesEx : NaCI (s) + 1/2CI2 (g) NaCI (s) 8. Ex 1Calculate the H ,enthalpy change for the reaction below4 CH3NHNH2 + 5 N2O4 4CO2 + 12 H2O + 9N2Steps 1 9. Ex 1Calculate the H ,enthalpy change for the reaction below 4 CH3NHNH2 + 5 N2O4 4CO2 + 12 H2O + 9N2Steps12 Formation of reactants dataFormation of products data 10. Ans Calculate the H ,enthalpy change for the reaction below4 CH3NHNH2 + 5 N2O4 4CO2 + 12 H2O + 9N2 11. AnsCalculate the H ,enthalpy change for the reaction below 4 CH3NHNH2 + 5 N2O4 4CO2 + 12 H2O + 9N2 AnsFormation data 12. Ex 2 Calculate the H ,enthalpy change for the reaction below NH4NO3 N2O + 2 H2O using energy cycle diagram 13. Ex 2Calculate the H ,enthalpy change for the reaction below NH4NO3 N2O + 2 H2O using energy cycle diagramAnsFormation data 14. Ex 2 Calculate the H ,enthalpy change for the reaction below NH4NO3 N2O + 2 H2O using energy level diagram 15. Ex 2Calculate the H ,enthalpy change for the reaction below NH4NO3 N2O + 2 H2O using energy level diagramAnsFormation data 16. Ex 3 Calculate the H ,enthalpy change for the reaction below C2H6 + 7/2O2 2CO2 + 3 H2O using energy cycle diagram 17. Ex 3Calculate the H ,enthalpy change for the reaction belowC2H6 + 7/2O2 2CO2 + 3 H2O using energy cycle diagramAns 18. Ex 3 Calculate the H ,enthalpy change for the reaction below C2H6 + 7/2O2 2CO2 + 3 H2O using energy level diagram 19. Ex 3Calculate the H ,enthalpy change for the reaction belowC2H6 + 7/2O2 2CO2 + 3 H2O using energy level diagramAns 20. Ex 4 Calculate the H ,enthalpy change for the reaction below C2H4 + H2C2H6 21. Ex 4 Calculate the H ,enthalpy change for the reaction below C2H4 + H2C2H6AnsEnergy Cycle diagram 22. Ex 4 Calculate the H ,enthalpy change for the reaction below C2H4 + H2 C2H6AnsEnergy Cycle diagram or Energy Level Diagram Answer the same = -137kJmol-1 23. Ex 5 Write balanced equation and calculate the H for the following reactionsa) Zinc + Chlorine forming zinc chlorideb) Hydrogen sulfide + sulfur dioxide forming sulfur and waterc) Lead (II) nitrate decomposing to lead (II) oxide, nitrogen dioxide and oxygen 24. Ex 4 Write balanced equation and calculate the H for the following reactionsa) Zinc + Chlorine forming zinc chlorideb) Hydrogen sulfide + sulfur dioxide forming sulfur and waterc) Lead (II) nitrate decomposing to lead (II) oxide, nitrogen dioxide and oxygen 25. Standard Enthalpy Change of combustion, H c 26. Standard Enthalpy Change of combustion, H cH c= Amt of energy released when ONE mole of substance completely burnt inOXYGEN under standard conditionsNotes on combustion 27. Ex 1Calculate the H ,enthalpy change for the reaction belowUsing Energy Cycle Diagram 2 C + 3H2 C2H6 28. Ex 1Calculate the H ,enthalpy change for the reaction belowUsing Energy Cycle Diagram 2 C + 3H2 C2H6Ans 29. Ex 2Calculate the H ,enthalpy change for the reaction below1st methodUsing Energy Cycle Diagram 2 C + 2H2 C2H4 30. Ex 2Calculate the H ,enthalpy change for the reaction below1st methodUsing Energy Cycle Diagram 2 C + 2H2 C2H4Ans 31. Ex 2Calculate the H ,enthalpy change for the reaction below2nd methodUsing Energy Level Diagram 2 C + 2H2 C2H4 32. Ex 2Calculate the H ,enthalpy change for the reaction below2nd methodUsing Energy Level Diagram 2 C + 2H2 C2H4Ans 33. Ex 3Calculate the H ,enthalpy change for the reaction below1st methodUsing Energy Cycle Diagram 2 C + 3H2 + 1/2O2 C2H5OH 34. Ex 3Calculate the H ,enthalpy change for the reaction below1st methodUsing Energy Cycle Diagram 2 C + 3H2 + 1/2O2 C2H5OHAns 35. Ex 3Calculate the H ,enthalpy change for the reaction below2nd methodUsing Energy Level Diagram 2 C + 3H2 + 1/2O2 C2H5OH 36. Ex 3Calculate the H ,enthalpy change for the reaction below2nd methodUsing Energy Level Diagram 2 C + 3H2 + 1/2O2 C2H5OHAns 37. Ex 4 Calculate the H ,enthalpy change for the reaction belowTWO methods1st method, using combustion data2 C + 3H2 + 1/2O2 C2H5OHCombustion data 38. Ex 4 Calculate the H ,enthalpy change for the reaction belowTWO methods1st method, using combustion data2 C + 3H2 + 1/2O2 C2H5OHAnsCombustion data 39. Ex 4Calculate the H ,enthalpy change for the reaction below2nd method, using formation data 2 C + 3H2 + 1/2O2 C2H5OHFormation data 40. Ex 4Calculate the H ,enthalpy change for the reaction below2nd method, using formation data 2 C + 3H2 + 1/2O2 C2H5OHFormation dataAns 41. Ex 5Calculate the H ,enthalpy change for the reaction belowUsing combustion data3C2H2C6H6Combustion data 42. Ex 5Calculate the H ,enthalpy change for the reaction belowUsing combustion data3C2H2C6H6AnsCombustion data 43. Ex 6Calculate H c ,enthalpy change for combustion of propene shown belowUsing combustion /formation data 3CH2 =CHCH3 + 9/2O2 3CO2 + 3H2O6 44. Ex 6Calculate H c ,enthalpy change for combustion of propene shown belowUsing combustion /formation data 3CH2 =CHCH3 + 9/2O2 3CO2 + 3H2O6Ans 45. Ex 7 Calculate the H ,enthalpy change for the reaction belowC2H4 + H2 C2H6 Using Energy Cycle Diagram Using Energy Level DiagramAnswer the same = -137kJmol-1 46. Video on Energetics and Enthalpy Calculation Using equation method to solve HUsing equation method to solve HUsing formation enthalpy to solve H (Khan Academy) Concept on enthalpy, H (Khan Academy) 47. AcknowledgementsThanks to source of pictures and video used in this presentationThanks to Creative Commons for excellent contribution on licenseshttp://creativecommons.org/licenses/Prepared by Lawrence KokCheck out more video tutorials from my site and hope you enjoy this tutorialhttp://lawrencekok.blogspot.com