Four of the following factors can affect the forward rate of a chemical reaction.
Which one cannot affect this rate?
1) temperature
2) particle size of solid reactants
3) concentration of reactants
4) presence of a catalyst
5) removal of some of the products
OK, I did this question through the process of elimination.
A) temperature~ if you increase the temperature in an exothermic process the reaction will turn left. vice versas for an endothermic system. Thereforem it affects equilibrium.
B) I will get to this later
C) Concentration of reactants~ It matters a whole lot. eg.
X+Y--> XY
lets say you have 100 atm of XY and O atm of X and 300 atm of Y. This system will go toward the reactants to try to produce some X.
D) presence of a catalyst-- it affects the rate of a reaction as we all know by lowering the activation energy of the system.
E) Removal of some products. eg.
XY+Z-->XZ+Y
Lets say you take away some Y from the products. The system will shift left to produce some Y again.
So my answer in B). I am quite sure but if I am wrong please correct me. I want to learn
My question (sample AP)
Match the following with the statements given below. An answer can be used more than once or not at all
A) H2
B) He
C) O2
D) N2
E) CO2
(the 2s are subscripts)
1. This is the most plentiful gas in the earth atmosphere. (Kudos to those who can say what percent of the atmosphere it makes up)
2. A 1 mole sample of this gas occupying 1 liter will have the greatest density
3. At a given temperature, this gas will have the greatest effusion.
4. The molecules of this gas contain plar bonds
5. The molecules of this gas contains triple bonds.
Good Luck!