Reduction

Question 1

What type of catalyst

Answer 1

Heterogeneous

Question 2

Name the three phrases

Answer 2

1. Adsorption
2. Chemical reaction
3. Desorption

Question 3

Describe adsorption of reactants

Answer 3

H and ethene get ADSORBED onto the catalytic surface;

Weakening of H-H and pi of C=C bonds;

(Due to donation of electron density into vacant d orbitals)

Increases surface conc of reactants

Question 4

Describe chemical rn

Answer 4

H atoms interact with e density in ethene double bonds and bonds w C atoms;

Reaction occurs with lower Ea;

Bonds within reactant molecules are weakened by adsorption effects;

Question 5

Describe desorption of pdts

Answer 5

Pdt ethane (the multiple bond -1) desorbs from the surface of catalyst