Reaction Rates

Why does a higher temperature increase the rate of a reaction?

• it increases both the frequency and energy of particle collisions

• it only increases the frequency of particle collisions

• it only increases the energy of particle collisions

• it reduces the activation energy of the reaction

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NGSS.HS-PS1-5

What does NOT happen when the temperature is increased?

• Particles collide more often

• Particles collide with more energy

• Particles move faster

• More particles collide in the correct orientation

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The ______________is required to break the bonds of the reactants.

• Carbonic energy

• Activation energy

• Plutonic energy

• Energi Gaib

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What makes an effective collision?

• When molecules collide.

• When molecules collide with the proper orientation.

• When molecules collide with proper orientation and enough kinetic energy.

• High Temperature.

Why don't all collisions between particles cause a reaction?

• the particles also need to collide with a catalyst

• not all the particles collide with enough energy

• not all the particles collide at a high enough temperature

• the particles need to collide with each other twice

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The minimum amount of energy needed for colliding particles to react is called

• Chemical Energy

• Kinetic Energy

• Activation Energy

• Potential Energy

How does a higher concentration of reactants affect the speed of a reaction?

• A higher concentration of reactants increases the speed of a reaction.

• A higher concentration of reactants only affects the temperature of the reaction.

• A higher concentration of reactants decreases the speed of a reaction.

• A higher concentration of reactants has no effect on the speed of a reaction.

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What is the relationship between concentration and reaction rate?

• Higher concentration decreases the reaction rate.

• Higher concentration typically increases the reaction rate.

• Lower concentration increases the reaction rate.

• Concentration has no effect on reaction rate.

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What is meant by 'reaction rate'?

• The reaction rate is the temperature of a chemical reaction.

• The reaction rate refers to the amount of energy released during a reaction.

• The reaction rate is the volume of gas produced in a reaction.

• The reaction rate is the speed of a chemical reaction, indicating how quickly reactants turn into products.

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How can we measure the rate of a chemical reaction?

• By counting the number of molecules present.

• By observing the color change of the reactants.

• The rate of a chemical reaction can be measured by monitoring the change in concentration of reactants or products over time.

• By measuring the temperature of the reaction mixture.

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