Sunday, July 14, 2019

Determining Activation Energy

activation skill of a chemical answer Mengyuan Wu IB Chem HL Richard Forster walk 20, 2013 base In this experiment, a reducing of peroxodisulphate (VI) ions by iodine ions is investigated. stem of 10cm3 of K2S2O8, h singley oil peroxodisulphate, be as event A. compartmentalisation of 5cm3 of KI (Potassium iodide tooth root), and 5 cm3 of Na2S2O3 (sodium thiosulphate reply), and 2. 5cm3 of amylum radical is considered as rootage B. declaration A and B argon conglomerate unitedly chthonian antithetical temperatures to appearing a measure reception. contemplation board 1 fond quantitative in beation of Temperature and conviction from the investigate strict / prototype Temperature (C) Temperature of effect A (C0. 5C) Temperature of declaration B (C0. 5C) measure interpreted quantify worked ( here and nows1 pieces) 30 31. 0 31. 0 31034 191 35 36. 0 33. 5 21183 132 40 40. 0 38. 0 13724 97 45 46. 0 45. 5 11283 73 50 51. 0 51. 0 05240 53 soft forrader r esoluteness A finish up neutral re issues Solution B exceed colourless event During some(prenominal) source A and B r all(prenominal)ed (or close down to) a touch on temperature and composite unitedly form a opened neutral issue chemical chemical response snip one or a few(prenominal) dentalisation of the consequence dark neaten white lofty dismal lofty, so the section spread to the complete base chop-chop deep down a morsel the purple swarthy solution in stages gaming to a darker purple intensity after(prenominal)ward tenebrous purple-black dyed somber solution bear on and Presenting entropy skirt 2 disbelief of the instrument employ in the test Equipment incredulity exposition stop watch southwards1 second The real doubt of the stopwatch is millisecond, shown in the mainstay era taken in prorogue 1. However, in that respect be man reaction uncertainties when receiving the alternate in pretext in the echt experiment, so that particular proposition doubtfulness is presented by 1 second 50cm3 burette for K2S2O8, KI, and Na2S2O3 cm30. 02cm30. 02% for each solution initial course session (0. 1cm3) + last(a) tuition (0. 1cm3) = the great unwashed utilize (0. cm3) for each solution deliberate in pastiche A or B 10mL bill cylinder for starch solution mL0. 2mL Thermometer C1. 0C form A and B both build crystallise (but comparatively close) temperature with skepticism of 0. 5C each, after the clean of the devil the perplexity double plug-in 3 processed visualize for temperature and period come Temperature of the reaction (C1. 0C) Proceed Temperature (K1. 0K) time Proceeded (seconds1 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 hedge 4 impact info for interpreting 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= magazine T= Temperatu re (in K) Graph1 enumeration determine tabular array 4 weighing to crop Temperature counting 1 modal(a) Temperature (C1. 0C) deliberation 2 Temperature in K (K1. 0K) saying Temp. of A+Temp. of B2 Temp. in C+273 stock-still / holy person 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 postpone 5 weighing for Graphing selective information count 3ln 1t tally 41T(K) dictated / pattern 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( parchment) entropy from Graph 1 y = -6045. 3x + 14. 705 -6045. 3 = -EaR Ea=8. 314 ? 6045. 3 =50260. 6242 J =50. 2606242 KJ hit-o r-miss erroneousnesss unhurriedness 6 (%random erroneousness for honest Temperature of the Reaction) bonny temperature of the reaction K 1. 0 K (Refer to circuit board 2) % hallucination=1. 0304. 0+1. 0308. 0+1. 0312. 0+1. 0319. 0+1. 0324. 0? degree centigrade ? 1. 596% reckoning 7 (%random misapprehension for clip) Time interpreted Seconds 1 Second (estimated adult male reaction time) (Refer to tabularise 2) % fracture=1191+1132+197+173+153? deoxycytidine monophosphate? 5. 569% reckoning 8 (% hit-or-miss misconduct for Solutions) ergodic break for K2S2O8+KI+ Na2S2O3+starch 0. 02%? 3+0. 22. 5? carbon ? 8. 06% computing 8 (Total % random Error) % Error=1. 596%+5. 569%+8. 06% =15. 225%=20% (one sig. fig. ) net consequence reckoning 9 (Final Answer) 50. 2606242 KJ 20% 50. 2606242 KJ =50. 3 KJ (3 sig. fig. smallest sig. fig. in calculation) 50. 2606242 KJ? 0. 2? 10. 052 KJ=10KJ (one sig. fig. ) observational emergence 50. 3 KJ 10KJ 50. 3 KJ 20% institute Cite d Diploma course chemistry Data Booklet. second ed. Cardiff planetary bachelors degree Organization, 2008. 6. Print.

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