Collision Theory (1 Viewer)

[drakeshiesty]

Is it that:

frequency of collisions are affected by concentration
rate of successful collisions are affected by temperature

and both of these drive frequency of successful collisions or does temperature also affect frequency of collisions on its own (I saw this online when I searched)? or is this just waffle lmao pls help maybe im making it convoluted

Also, for HSC, is it important to be well-versed on gibbs free energy or just surface level stuff (spontaneity)?

 

[academic_reaper]

"Why did the two atoms break up?"
Because they didn’t have enough activation energy to make their relationship work.

 

[cheesynooby]

Is it that:

frequency of collisions are affected by concentration
rate of successful collisions are affected by temperature

and both of these drive frequency of successful collisions or does temperature also affect frequency of collisions on its own (I saw this online when I searched)? or is this just waffle lmao pls help maybe im making it convoluted

Also, for HSC, is it important to be well-versed on gibbs free energy or just surface level stuff (spontaneity)?

temperature: increases % of collsions that are successful
and frequency of collisions (but pretty minor effect)

concentrations: increases frequency of collisions

gibbs free energy isn't really needed in much detail just know its relation to spontaneity

 

[wizzkids]

The Gibbs Free Energy concept is very important for understanding Chemistry, and dynamic equilibrium (Module 5) in particular.
As others have said, the processes in Nature that are spontaneous are associated with negative Gibbs Free Energy change.
At equilibrium in a chemical system, the Gibbs Free Energy change of the forward and reverse reactions must both be zero
(think deeply about that).
From Module 4 "Drivers of Reactions" you should understand that 3 state variables contribute to the free energy change.
The relevant equation is ΔG = ΔH - TΔS
The state variables are:

• Enthalpy change ΔH (basically the making and breaking of bonds)
• Entropy change ΔS (the increase or decrease of the number of particles in the system, and their degrees of freedom)
• Temperature (in Kelvin)

The Gibbs Free Energy equation can explain why spontaneous process at room temperature may become non-spontaneous at elevated temperature if the change involves a negative change of entropy, and vice versa.