9A.3 Flashcards

1
Q

describe a Maxwell-Boltzmann distribution graph

A
  1. the curve is never symmetrical

2. it starts at the origin and finishes near the x-axis asymptote

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2
Q

compare a Maxwell-Boltzmann distribution graph of two different temperature

A
  1. both graphs have the same area under the graph

2. and the higher temperature peak would be lower and more to the right

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3
Q

how do you label the x-axis and the y-axis in a Maxwell-Boltzmann distribution graph

A
y-axis = fraction o molecule with energy 
x-axis = energy
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4
Q

how do we find the number of molecules that have enough energy to successfully collide

A

by looking at the area under the graph from the activation energy mark

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5
Q

how does the temperature affect the rate of reaction and why

A

the rate of collisions increases, because an increase in temperature increases the fraction of molecules that possess the required activation energy therefore more successful collisions per second

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6
Q

is the fraction of collisions with energy equal or greater than Ea and the fraction of molecules with the same energy =

A

that is not true but with very high energies and a small fraction the difference isn’t as much

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7
Q

in the gas phase, a single molecule might have how many collisions per second

A

10^9 or 10^10 depending on the size

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8
Q

what are the two stages for the reaction in a solution

A
  1. molecules have to come together by a process of diffusion, in the same solvent cage
  2. they have to react
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9
Q

what is a solvent cage

A

it happens in low-to-mid concentrations where the solvents are more dominant than the solute so they would entirely cover them in a solvent cage

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10
Q

are collisions in solution faster than the collision in the gas phase

A

gas-phase usually has more collisions, but if the solute molecules get trapped in a solvent cage they can react together and collide similarly to the collisions in the gas phase

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11
Q

the chances of two species meeting each other in a solution is proportional

A

to their concentration just as in the gas phase

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