Determining Activation Energy Essay Example

Deciding Activation Energy Essay Initiation vitality of a response Mengyuan Wu IB Chem HL Richard Forster March 20, 2013 Introduction: In this examination, a decrease of peroxodisulphate (VI) particles by iodine particles is researched. Arrangement of 10cm3 of K2S2O8, potassium peroxodisulphate, spoke to as ‘Solution A’. Blend of 5cm3 of KI (Potassium iodide arrangement), and 5 cm3 of Na2S2O3 (sodium thiosulphate arrangement), and 2. 5cm3 of starch arrangement is considered as ‘Solution B’. Arrangement An and B are combined under various temperatures to show a â€Å"clock† response. Perception: Table 1: Raw Quantitative Data of Temperature and Time from the Experiment Fixed/Ideal Temperature ( °C)| Temperature of Solution A ( °C ±0. 5 °C)| Temperature of Solution B ( °C ±0. 5 °C)| Time Taken| Time Proceeded (secondsâ ±1 seconds)| 30| 31. 0| 31. 0| 3:10:34| 191| 35| 36. 0| 33. 5| 2:11:83| 132| 40| 40. 0| 38. 0| 1:37:24| 97| 45| 46. 0| 45. 5| 1:12:83| 73| 50| 51. 0| 51. 0| 0:52:40| 53| Qualitative: Previously: Solution A: reasonable dry arrangements; Solution B: clear drab arrangement During: Both arrangement An and B came to (or near) a fixed temperature and combined structure an unmistakable dismal arrangement response time: one or barely any segment of the arrangement turned clear light purple murky purple, at that point the segment grow to the whole arrangement quickly inside a second the purple obscure arrangement progressively go to a darker purple shading After: Dark purple-dark hued hazy arrangement Processing and Presenting Data: We will compose a custom article test on Determining Activation Energy explicitly for you for just $16.38 $13.9/page Request now We will compose a custom article test on Determining Activation Energy explicitly for you FOR ONLY $16.38 $13.9/page Recruit Writer We will compose a custom article test on Determining Activation Energy explicitly for you FOR ONLY $16.38 $13.9/page Recruit Writer Table 2: Uncertainty of the Apparatus Used in the Experiment Equipment| Uncertainty| Explanation| Stopwatch| Secondsâ ±1 second| The real vulnerability of the stopwatch is millisecond, appeared in the section ‘Time Taken’ in Table 1. Nonetheless, there are human response vulnerabilities while accepting the adjustment in shading in the real examination, with the goal that specific vulnerability is introduced by  ±1 second| 50cm3 Burette for K2S2O8, KI, and Na2S2O3| cm3â ±0. 02cm30. 02% for each solution| Initial Reading ( ±0. 1cm3) + Final perusing ( ±0. 1cm3) = volume utilized ( ±0. cm3) for each arrangement estimated in blend An or B| 10mL Measuring Cylinder for starch solution| mL ±0. 2mL| | Thermometer|  °C ±1. 0 °C| Mixture An and B both have isolated (however moderately close) temperature with vulnerability of  ±0. 5 °C each, after the normal of the two the vulnerability doubles| Table 3: Processed date for temperature and time Average Temperat ure of the response ( °C ±1. 0 °C)| Proceed Temperature (Kâ ±1. 0K)| Time Proceeded (secondsâ ±1 seconds)| 31. 0| 304. 0| 191| 35. 0| 308. 0| 132| 39. 0| 312. 0| 97| 46. 0| 319. 0| 73| 51. 0| 324. 0| 53| Table 4: Processed information for Graphing ln 1t (3 sig fig)| 1T (K)(4 sig fig)| - 5. 25| 0. 003289| - 4. 88| 0. 003246| - 4. 57| 0. 003205| - 4. 29| 0. 003134| - 3. 97| 0. 003086| ln 1t=lnK (Proportional) t= Time T= Temperature (in K) Graph1: Calculation: Values: Table 4: Calculation to Process Temperature: | Calculation 1: Average Temperature ( °C ±1. 0 °C)| Calculation 2: Temperature in K (Kâ ±1. 0K)| | Formula| Temp. of A+Temp. of B2| Temp. in  °C+273| Fixed/Ideal Temperature ( °C)| 30| 31. 0+31. 02=31. 0| 31. 0+273=304. 0| | 35| 36. 0+33. 52=34. 75? 35. 0| 35. +273=308. 0| | 40| 40. 0+38. 02=39. 0| 39. 0+273=312. 0| | 45| 46. 0+45. 52=45. 75? 46. 0| 46. 0+273=319. 0| | 50| 51. 0+51. 02=51. 0| 51. 0+273=324. 0| Table 5: Calculation for Graphing Data | Calculation 3:ln 1t| Calculation 4:1T(K)| Fixed/Ideal Temperature ( °C)| 30| ln1191? - 5. 25| 1304? 0. 003289| | 35| ln1132? - 4. 88| 1308? 0. 003246| | 40| ln197? - 4. 57| 1312? 0. 003205| | 45| ln173? - 4. 29| 1319? 0. 003134| | 50| ln153? - 3. 97| 1324? 0. 003086| Calculation 5 (Activation Energy): lnk= - EaR ? 1T+lnA y = m(slope) x + c R=8. 314 Jmol-1K-1(Diploma) Information from Graph 1: y = - 6045. 3x + 14. 705 - 6045. 3 = - EaR Ea=8. 314 ? 6045. 3 =50260. 6242 J =50. 2606242 KJ Random Errors: Calculation 6: (%Random Error for Average Temperature of the Reaction) Average temperature of the response K  ± 1. 0 K (Refer to Table 2) % Error=1. 0304. 0+1. 0308. 0+1. 0312. 0+1. 0319. 0+1. 0324. 0? 100 ? 1. 596% Calculation 7: (%Random Error for Time) Time Taken Seconds  ± 1 Second (evaluated human response time) (Refer to Table 2) % Error=1191+1132+197+173+153? 100? 5. 569% Calculation 8: (% Random Error for Solutions) Random Error for K2S2O8+KI+ Na2S2O3+Starch 0. 02%? 3+0. 22. 5? 100 ? 8. 06% Calculation 8: (Total % Random Error) % Error=1. 596%+5. 569%+8. 06% =15. 225%=20% (one sig. fig. ) Final Answer: Calculation 9: (Final Answer) 50. 2606242 KJ  ±20% 50. 2606242 KJ =50. 3 KJ (3 sig. fig. >smallest sig. fig. in figuring) 50. 2606242 KJ? 0. 2? 10. 052 KJ=10KJ (one sig. fig. ) Experimental Result: 50. 3 KJ  ±10KJ 50. 3 KJ  ±20% Wor k Cited: Diploma Program Chemistry Data Booklet. second ed. Cardiff: International Baccalaureate Organization, 2008. 6. Print.