Textbook-Integrated Guide to Educational Resources

Phase	Hof (kJ/mol)	So (J/(K*mol))
white tin	0	51.5
grey tin	-2.1	44.8

Which type of stability does each exhibit at 40 ^oC?

white tin {1:MULTICHOICE:kinetically stable#No, that's incorrect.~=thermodynamically stable#Correct!}

grey tin {1:MULTICHOICE:=kinetically stable#Correct!~thermodynamically stable#No, that's incorrect.}

Hint: This is asking for the ratio of rates which is proportional to the ratio of the rate constants, all else being equal.

(1) Based on the units of the rate constant, what is the order of the reaction? {1:MULTICHOICE:zero-order#No, that is not correct.~=first-order#Correct!~second-order#No, that is not correct.~third-order#No, that is not correct.}

(2) What is the concentration of CH₃CN after 0.20 minutes of reaction if the initial concentration is 0.10 M? {1:NUMERICAL:=4e-4:1e-5#Correct!~%50%4e-4:5e-5#Close, but not quite.}(Do not include units!)

the following mechanism has been proposed at high temperatures:
(1) NO₂ + CO O-N-O-C-O (slow)
(2) O-N-O-C-O NO + CO₂ (fast)
Check the box for each species that is an intermediate in this mechanism.

Use the plots below to determine the order of the reaction with respect to A.

has the following rate expression at high temperatures:

Rate=k[NO₂][CO]

Is the following mechanism compatible with the experimental information?
(1) NO₂ + CO O-N-O-C-O (slow)
(2) O-N-O-C-O NO + CO₂ (fast)
Choose the best answer.

CO(g) + Cl₂(g) COCl₂(g)