Plz
1) How will increasing the surface area of one or more reactants affect the reaction rate o...
Chemistry, 04.04.2020 01:43 kjhgfcvb5761
Plz
1) How will increasing the surface area of one or more reactants affect the reaction rate of a system?
A It will change the products of the reaction.
B It will speed up the reaction.
C It will slow down the reaction.
D It will have no effect on the reaction.
2)Which change will usually speed the reaction rate of a chemical system?
A increase the concentration of a reactant
B decrease the temperature of the system
C decrease the pressure of a system
D increase the concentration a product
3) Some metals found in a car’s exhaust system speed up a chemical reaction but are not used up.
How do these metals work to speed up the reaction?
A They act as catalysts.
B They increase the pressure in the system.
C They increase the temperature of the system.
D They increase the concentration of reactants.
4) How does a catalyst affect the activation energy of a reaction?
A A catalyst increases the activation energy needed for a reaction.
B A catalyst does not affect the activation energy of a reaction.
C A catalyst decreases the activation energy needed for a reaction.
D A catalyst eliminates the need for activation energy.
5) Which theory explains the increase in reaction rate caused by raising the temperature or raising the pressure of a system?
A potential energy theory
B activation energy theory
C surface area theory
D collision theory
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