08 Question (8 points)

There are two parts to this question. Please complete both parts using the Reaction Data Table provided below.

For the dimerization:

2C₂H₂(g) →→→→ C₂H₁₂ (8)

The following data were obtained:

Time (s) C₂H6 Concentration (M)

1.15x102

364.0

1109

1.06x102

2878 8.79x10-3

4088

7.72x10-3

12820 3.00x103

What is the order of this reaction?

Choose one:

O Zeroth Order

O First Order

O Second Order

OPseudo-First Order

Use your preferred graphing program to construct plots of these data. Determine what order best describes this reaction data, and use the slope and

intercept to answer the questions below. Also, if you can't get your graphing program to give you adequate decimal places in the slope, you can still use

"rise over run", also known as "slope - AY/AX" to get a good estimate of the slope directly from the data.

Part 1 (4 points)

Part 2 (4 points)

In([C₂H61/C₂H6l

-4.47

-4.55

-4.73

-4.86

-5.81

Choose one:

O Ms¹

O g.1

o Mist

0 M²5²

What is the initial (time - 0 sec) concentration of C&H? Hint: Look at the equation of your fit line!

What are the correct units for the rate constant?

What is the value of the rate constant?

87.0

94.3

114

130

333

See Periodic Table

M