Module 5 - Physical Chemistry and Transition Elements

Question 1

What does [X] mean

Answer 1

The concentration of X

Question 2

Describe zero order [X]^0

Answer 2

Rate is proportional to [X]^0 and therefore is unaffected by concentration change as concentration = 1

Question 3

Describe first order [X]^1

Answer 3

rate is doubled when the concentration is doubled and so is proportional to [X]^1

Question 4

Describe second order [X]^2

Answer 4

Proportional to [X]^2 and so a double of rate is equivalent to the square of the concentration

Question 5

Rate Equation for A + B -> products

Answer 5

R= k[A]^m[B]^n

Question 6

Overall order is…

Answer 6

sum of individual orders

Question 7

How does zero order affect half life

Answer 7

decreases over time

Question 8

How does first order affect half life

Answer 8

half life stays constant

Question 9

How does second order affect half life

Answer 9

increases over time

Question 10

Half life equation

Answer 10

half life (t1/2)=Ln(2)/k

Question 11

What is the rate determining step

Answer 11

the slow step, highest activation energy