ilovepdf_merged NEEDYUMPU

moving from one side to another, and when particles are moving more, they are way more
prone to collide into one another because they are moving more.
- -The surface area does have a relation to how much the particles in the substance collide, and
the concentration of the substance.
- -When the surface area is increased, the particles have more space to be moving around in,
and therefore do have to collide into one another so much.
-
catalyst
C6H6 + Br2 → C6H5Br + HBr
5 Which of the following changes will cause an increase in the rate of the above reaction?
A increasing the concentration of Br2
B decreasing the concentration of C6H6
C increasing the concentration of HBr
D decreasing the temperature
- Answer A
- Increasing the concentration of a reactant will increase the rate of the reaction.
- Increasing the concentration of a product will not increase the rate of the reaction.
- Br2 and C6H6 are reactants, and HBr is a product.
- If the reaction is exothermic, heat energy is released as the reaction occurs. When heat
energy is released, decreasing the temperature will increase the rate of the reaction
2CO + O2 → 2CO2
6 If the above reaction takes place inside a sealed reaction chamber, then which of these procedures
will cause a decrease in the rate of reaction?
A raising the temperature of the reaction chamber
B increasing the volume inside the reaction chamber
C removing the CO2 as it is formed
D adding more CO to the reaction chamber
- Answer: B
- Increasing the volume of the chamber will make the particles more farther apart and spread
out, this will decrease the rate of the reaction
- Raising the temperature of the reaction temperature is not the correct answer because
temperature is a one of the key elements that affect the reaction rate
- The answer would be letter B because when the surface area or volume is decreased, the
reaction will occur much slower.
- - When water is stored in a container, the smaller or bigger it is makes it either take longer or
less time to become ice.
- - This is kind of what the enclosed container does to this reaction, there is less room for the
reaction to occur.
- -Also, adding or removing parts of the equation, are not going to do anything, just change what
is reacting.
7 A catalyst can speed up the rate of a given chemical reaction by
A increasing the equilibrium constant in favor of products.
B lowering the activation energy required for the reaction to occur.
C raising the temperature at which the reaction occurs.
D increasing the pressure of reactants, thus favoring products.
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