Reaction Rate

question

Which statement best applies collision theory to preventing a dangerous reaction from occurring?
answer

Keep the reactants in separate containers.
question

Which will cause an increase in the reaction rate between molecules?
answer

Molecules collide more frequently.
question

Consider the reaction below. C2H4(g)+H2(g)–>C2H6(g) Which change would likely cause the greatest increase in the rate of the reaction?
answer

increase temperature and increase pressure
question

A change in which factor will affect the rate of reaction only when gases are involved?
answer

pressure
question

An increase in temperature affects the reaction rate by
answer

increasing the number of molecules that have sufficient kinetic energy to react.
question

How does an increase in reactant concentration affect the rate of reaction?
answer

It leads to more frequent collisions, which increase reaction rate.
question

Which best explains why sawdust burns more quickly than a block of wood of equal mass under the same conditions?
answer

More molecules in the sawdust can collide with oxygen molecules.
question

Which topic is commonly used to explain activation energy and how chemical reactions happen?
answer

collision theory
question

Ben observes how quickly some dry wood is burning in a campfire. Which term best relates to Ben’s observation?
answer

reaction rate

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