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In: Chemistry

Q1. A catalyst support adsorbs 2 cm3 of nitrogen at 1 mbar pressure and 6 cm3...

Q1. A catalyst support adsorbs 2 cm3 of nitrogen at 1 mbar pressure and 6 cm3 at 6 mbar. Find the volume of gas corresponding to one monolayer coverage (Vm).

(nb Give answer to 2 dp even if its an integer - eg write 5.00. DO NOT give units in your answer)

Q2.

In the following mechanism * indicates a radical species. Identify the nature of each of the steps in the reaction:

1.     Br2 + H2 --> 2Br* + H2

2.     Br2 + Br2--> 2Br* + Br2

3.     Br* + H2  --> HBr + H*

4.     H* + Br2 --> HBr + Br*

5.     H* + HBr --> H2 + Br*

6.     Br* + HBr --> Br2 + H*

7.     2Br* + Br2 --> 2Br2

      -       A.       B.       C.       D.   

Identify the nature of Step 1

1.     Br2 + H2 --> 2Br* + H2
      -       A.       B.       C.       D.   

Identify the nature of Step 2

2.     Br2 + Br2--> 2Br* + Br2
      -       A.       B.       C.       D.   

Identify the nature of Step 3

3.     Br* + H2  --> HBr + H*
      -       A.       B.       C.       D.   

Identify the nature of Step 4

4.     H* + Br2 --> HBr + Br*
      -       A.       B.       C.       D.   

Identify the nature of Step 5

5.     H* + HBr --> H2 + Br*
      -       A.       B.       C.       D.   

Identify the nature of Step 6

6.     Br* + HBr --> Br2 + H*
      -       A.       B.       C.       D.   

Identify the nature of Step 7

7.     2Br* + Br2 --> 2Br2
A.

Inhibition
B.

Initiation
C.

Termination
D.

Propagation

Solutions

Expert Solution

1) BET constant C is not given.

2)the symbol in bold letters is the correct answer

A.

Inhibition
B.

Initiation
C.

Termination
D.

Propagation
      -       A.    B.       C.       D.   

Identify the nature of Step 1

1.     Br2 + H2 --> 2Br* + H2
      -    A.       B.       C.       D.   

Identify the nature of Step 2

2.     Br2 + Br2--> 2Br* + Br2
      -       A.       B.       C.       D.   

Identify the nature of Step 3

3.     Br* + H2  --> HBr + H*
      -       A.       B.       C.       D.   

Identify the nature of Step 4

4.     H* + Br2 --> HBr + Br*
      -       A.       B.       C.       D.

Identify the nature of Step 5

5.     H* + HBr --> H2 + Br*
      -       A.       B.       C.       D.

Identify the nature of Step 6

6.     Br* + HBr --> Br2 + H*
      -       A.       B.       C.       D.   

Identify the nature of Step 7

7.     2Br* + Br2 --> 2Br2

queen_honey_blossom answered 3 months ago
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