Please help me, I'm confused..
What are the four variables that can affect reaction rate? (1 pt)
- temperature
- size
- concentration
- pressure
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Using what you’ve learned about collision theory, choose one of the variables you listed above and explain what is happening at the molecular level.
(I chose 'size', but what does the molecular level part mean? I don't know what that is!)
Molecular level means "at the size of atoms and molecules" rather than "as we see the reaction in our daily lives". In other words the problem wants an explanation in terms of atoms and molecules and not in terms lumps or cups or pieces of a board. Here is a site I found on the web that explains all of these factors that affect the rate of a reaction. It's a lot of reading and it may be more than you want but it wraps up the whole concept of reaction rates and why each one of the variables works as it does. Size refers to surface area which is the part you have asked about but temperature, concentration, etc are discussed very well also.
h ttps://chem.libretexts.org/Bookshelves/Introductory_Chemistry/Map%3A_Introductory_Chemistry_(Tro)/15%3A_Chemical_Equilibrium/15.02%3A_The_Rate_of_a_Chemical_Reaction
Remember to close the space between h and ttps........
I can't post the url if I don't put the space there. Good luck.
THANK YOU SO MUCH!
what did u get for the other answers?
At the molecular level refers to the specific events and interactions that take place between individual molecules during a chemical reaction. In the case of the variable "size" affecting reaction rate, we can understand it in terms of collision theory.
According to collision theory, for a reaction to occur, particles (atoms or molecules) must collide with a certain amount of energy and in the correct orientation. The size of the particles involved can influence the reaction rate because it affects how often these collisions occur and whether they are successful in breaking or forming bonds.
When we talk about size at the molecular level, it primarily refers to the size or radius of the molecules or atoms involved in a reaction. Larger molecules have a greater cross-sectional area, making it more likely for collisions to occur. Therefore, larger molecules tend to have a higher reaction rate compared to smaller ones.
Additionally, larger molecules often have more complex structures, which can provide more locations or sites for other molecules to collide with, increasing the chances of successful reactions. On the other hand, smaller molecules might encounter each other less frequently, resulting in fewer successful collisions and a slower reaction rate.
Overall, understanding the molecular level aspect allows us to comprehend how size affects the rate of a chemical reaction by influencing the frequency and effectiveness of molecular collisions.