Kinetic Vs Thermo

Kinetic and Thermodynamic Reaction Condition Brandon Bullock 2/10/15

Objective The purpose of this experiment is to test kinetic theory by running several reactions and determine which product are formed under kinetic conditions and which products are formed under thermodynamic conditions. Kinetically controlled products have low transition states.
This makes it easy for the product to be formed at low temperatures. Thermodynamically controlled products for at higher temperatures due to this high activation energy barrier.

Data

Part

Melting Point
(theoretical)

Melting Point
(experimental)

Name of
Product

Comments

A1

167

162

Cyclohexanone semicarbazone White product

A2

202

202

Furfural
Off white
Semicarbazone Product

B1

167

166

Cyclohexanone semicarbazone White Product

B2

202

202

Furfural semicarbazone Off White product C1

202

193.7

Furfural
Off white
Semicarbazone product

C2

202

201

Furfural
Off white
Semicarbazone product

Mechanisms

Observations
A1­
The solution bubbles and fizzes. The product is white and flaky A2­ The furfural does not readily dissolve. The product was off white B1­ The product was flaky and white B2­ The product was flaky and white C1­ The product was off white and nearly yellow C2­ The product was off white and nearly yellow

Conclusion

The purpose of this experiment is to identify the differences between kinetic vs thermodynamic control in reactions. This was done by carrying out reactions with semicarbazide and either furfural or cyclohexanone. Part A1 of the experiment consisted of the reaction between cyclohexanone and
Semicarbazide. In A­1, 1.7g of semicarbazide hydrochloride was dissolved in solution made up 3g of sodium bicarbonate in 150ml of