5 Using Excel plot lnk on the y axis and 1Temperature on the x axis Be sure to

# 5 using excel plot lnk on the y axis and 1temperature

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5. Using Excel , plot ln(k) on the y-axis and 1/Temperature on the x-axis. Be sure to give your graph a title and to label the axes. 6. Use the Trendline option to get a linear, best-fit line of your data. Be sure to select “Display equation and R-squared value on graph” option. 7. Print out your graph and attach it to your lab sheet. 8. The slope of your best-fit line is R E a where R = 8.314 K mol J . Use this information to calculate the activation energy for the Iodine Clock reaction. Note that the units of R are in Joules while E a is in kJ. E a = __________________ kJ/mol 9. Given that H rxn = -370 kJ/mol for the Iodine Clock reaction, sketch an appropriately scaled reaction energy diagram at a temperature =298 K. Include arrows to show H rxn and E a , and be sure to write in the formulas for the reactants and products on the appropriate line. 86
[S 2 O 8 -2 ] = 0.20 M [S 2 O 8 -2 ] = 0.20 M [I -1 ] = 0.20 M 1 [I -1 ] = 0.20 M 2 Temp (K) V S2O8 (mL) V I- (mL) V H2O (mL) time (s) Temp (K) V S2O8 (mL) V I- (mL) V H2O (mL) time (s) 298 4 8 8 39 298 2 5 8 52 298 4 4 12 78 298 2 2 11 104 298 8 4 8 78 298 5 2 8 104 318 4 8 8 36 318 2 5 8 48 318 4 4 12 73 318 2 2 11 97 318 8 4 8 73 318 5 2 8 97 338 4 8 8 34 338 2 5 8 45 338 4 4 12 68 338 2 2 11 91 338 8 4 8 68 338 5 2 8 91 358 4 8 8 32 358 2 5 8 43 358 4 4 12 64 358 2 2 11 86 358 8 4 8 64 358 5 2 8 86 378 4 8 8 31 378 2 5 8 41 378 4 4 12 61 378 2 2 11 82 378 8 4 8 61 378 5 2 8 82 [S 2 O 8 -2 ]] = 0.10 M [S 2 O 8 -2 ] = 0.10 M [I -1] = 0.20 M 3 [I -1] = 0.20 M 4 Temp (K) VS2O8 (mL) VI- (mL) VH2O (mL) time (s) Temp (K) VS2O8 (mL) VI- (mL) VH2O (mL) time (s) 298 3 3 9 78 298 3 3 14 104 298 3 2 11 156 298 3 2 16 208 298 6 2 8 156 298 6 2 13 208 318 3 3 9 73 318 3 3 14 97 318 3 2 11 145 318 3 2 16 194 318 6 2 8 145 318 6 2 13 194 338 3 3 9 68 338 3 3 14 91 338 3 2 11 136 338 3 2 16 182 338 6 2 8 136 338 6 2 13 182 358 3 3 9 64 358 3 3 14 86 358 3 2 11 129 358 3 2 16 172 358 6 2 8 129 358 6 2 13 172 378 3 3 9 61 378 3 3 14 82 378 3 2 11 123 378 3 2 16 163 378 6 2 8 123 378 6 2 13 163 [S 2 O 8 -2 ] = 0.20 M [S 2 O 8 -2 ] = 0.20 M 87
[I -1] = 0.10 M 5 [I -1] = 0.20 M 6 Temp (K) VS2O8 (mL) VI- (mL) VH2O (mL) time (s) Temp (K) VS2O8 (mL) VI- (mL) VH2O (mL) time (s) 298 5 20 0 39 298 6 13 6 31 298 5 10 10 78 298 6 6 13 62 298 10 10 5 78 298 13 6 6 62 318 5 20 0 36 318 6 13 6 29 318 5 10 10 73 318 6 6 13 58 318 10 10 5 73 318 13 6 6 58 338 5 20 0 34 338 6 13 6 27 338 5 10 10 68 338 6 6 13 55 338 10 10 5 68 338 13 6 6 55 358 5 20 0 32 358 6 13 6 26 358 5 10 10 64 358 6 6 13 52 358 10 10 5 64 358 13 6 6 52 378 5 20 0 31 378 6 13 6 25 378 5 10 10 61 378 6 6 13 49 378 10 10 5 61 378 13 6 6 49 [S 2 O 8 -2 ] = 0.25 M [S 2 O 8 -2 ] = 0.10 M [I -1] = 0.20 M 7 [I -1] = 0.30 M 8 Temp (K) VS2O8 (mL) VI- (mL) VH2O (mL) time (s) Temp (K) VS2O8 (mL) VI- (mL) VH2O (mL) time (s) 298 2 5 9 52 298 7 5 23 78 298 2 2 11 104 298 7 2 25 156 298 4 2 9 104 298 14 2 18 156 318 2 5 9 48 318 7 5 23 73 318 2 2 11 97 318 7 2 25 145 318 4 2 9 97 318 14 2 18 145 338 2 5 9 45 338 7 5 23 68 338 2 2 11 91 338 7 2 25 136 338 4 2 9 91 338 14 2 18 136 358 2 5 9 43 358 7 5 23 64 358 2 2 11 86 358 7 2 25 129 358 4 2 9 86 358 14 2 18 129 378 2 5 9 41 378 7 5 23 61 378 2 2 11 82 378 7 2 25 123 378 4 2 9 82 378 14 2 18 123 88

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