According to the collision theory, if A(g) + B(g) rightarrow C(g) then which of

Question

According to the collision theory, if A(g) + B(g) rightarrow C(g) then which of the following is true? A and B must collide in order to react A and B must posses a total minimum energy. A and B must collide in the proper geometry. Most collisions between A and B are nonproductive. All of the above are true statements. If the activation energy for a reaction is 12 kJ/mole what would be the increase in the reaction rate as the temperature is raised from -73.0 degree C to 127 degree C? The half life of a first order reaction was found to be 15 minutes. Approximately how long will it take for 98% of the reaction to be completed? The decomposition of nitrogen dioxide into nitrogen monoxide and oxygen gas is second order with respect to the reactant. A graph of the data showing 1/[NO_2] on the vertical axis vs. time on the horizontal axis will produce

Explanation / Answer

17.
Answer E
For reaction to occue A and B must have proper energy and orientation and all collision doesn't result in C

18.
HERE:
T1 = -73 oC = (-73+273) K = 200 K
T2 = -127 oC = (127+273) K = 400 K
Ea = 12 KJ/mol = 12000 J
use:
ln (K2/K1) = Ea/R * [1/T1 - 1/T2]
ln (K2/K1) = 12000/8.314 * [1/200 - 1/400]
ln (K2/K1) = 12000/8.314 * [2.5*10^-3]
ln (K2/K1) = 3.61
K2/K1 = 37

So rate becomes 37 times faster

We are allowed to answer only 1 question at a time but since your 1st question was short, I have answered 2 .
Thanks

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