Which of the following will increase the number of effective collisions during a chemical reaction?

Increasing the reactant concentration

What is required for a chemical reaction to occur

Collisions must have enough energy

Collisions must have the correct orientation

Which factors decrease the rate of a reaction?

Decreasing the concentration of the reactants

Which will have a higher surface area?

A seltzer tablet ground into powder

A seltzer tablet cut into quarters

How does a catalyst increase the rate of a chemical reaction?

Decreases the activation energy

Increases the activation energy

Increases the energy of the particles

Decreases the energy of the particles.

Which of the following are not true for chemical equilibrium?

The concentration of all chemicals will be equal.

The forward and reverse reactions happen at the same rate.

There is no observable change in the reaction.

If an endothermic reaction has reached equilibrium, increasing the temperature will:

Favor both the forward and reverse reaction

Have no effect on the equilibrium

Which will cause an equilibrium to shift to relieve stress?

Decreasing the concentration of a product

Increasing the concentration of a reactant

According to collision theory, particles must:

Collide with correct orientation

The rate of a reaction depends upon:

The concentration of the reactants

The temperature of the reaction

A catalyst is a substance

That increases the rate of reaction but is not used up in the reaction.

That increases the rate of reaction and is changed during the reaction

That increases the rate of reaction and increases the amount of mass(es) formed in the reaction.

That has no effect on the rate of reaction.

Which one of the following statements about catalysts is true?

Catalysts are chemically unchanged at the end of a reaction.

Catalysts increase the temperature of a chemical reaction.

Catalysts increase the energy required for a reaction to take place.

What effect will decreasing the temperature have on the rate of a chemical reaction?

There will be no effect on the rate of reaction

Why does the rate of reaction increase when powdered calcium carbonate is used instead of lumps of marble chips.

There is an increase in surface area of the calcium carbonate.

There is an increase in temperature of the particles.

There is an increase in the concentration of the reactants.

Powdered calcium carbonate acts as a catalyst.

If we increase the concentration of a reactant, what happens to the collisions between particles?

There are the same number of collisions, but they have more energy.

There are the same number of collisions, but they have less energy.

By increasing the temperature of a chemical reaction, what happens to the collisions between particles?

There are more collisions and the particles have more energy.

There are fewer collisions taking place.

There are the same number of collisions and the particles have more energy.

There are more collisions, but the particles have less energy.

Which set of conditions will increase the rate of chemical reaction?

Increased temperature and increased concentration of reactants.

Decreased temperature and decreased concentration of reactants.

Decreased temperature and increased concentration of reactants.

Increased temperature and decreased concentration of reactants.

The particles of reactants must collide in order for a reaction to take place. The fewer the collisions, the slower the rate of reaction. Which one of the following will increase the rate of reaction?

Breaking a solid reactant into many small pieces.

Decreasing the pressure of gaseous reactants.

Decreasing the concentration of solutions taking part in the reaction.

Lowering the temperature of the reactants?

Which one of the following reactions will start with the highest rate?

5 g of limestone powder in 100 mL of 0.1 M HCl at $$45\degree C$$

5 g of limestone chips in 100 mL of 0.1 M HCl at $$25\degree C$$

5 g of limestone chips in 100 mL of 0.1 M HCl at $$45\degree C$$

5 g of limestone powder in 100 mL of 0.1 M HCl at $$25\degree C$$

In a reaction between two gases, which one of the following factors will not affect the rate of reaction?

The volume of the container that the gas is in

What effect does doubling the concentration of one of the reactants have on the rate of reaction?

It increases the rate of reaction

It decreases the rate of reaction

What principle states that when a system in chemical equilibrium experiences a disturbance, it will shift in equilibrium composition in a way that tends to counteract this change?

Heisenberg's Uncertainty Principle

$$N_2\ \left(g\right)\ +3H_2\ \left(g\right)\leftrightarrow\ 2NH_3\ \left(g\right)\ +\ \Delta$$ Assume the reaction is at equilibrium. Which of the following would shift the equilibrium to the left?

A decrease in the amount of $$NH_3$$

An increase in the amount of $$N_2$$

$$2SO_2\ \left(g\right)\ +\ O_{2\ }\left(g\right)\ \leftrightarrow\ 2SO_{3\ }\left(g\right)\ +\ \Delta$$ Adding $$SO_2\ \left(g\right)$$ will:

Increase the rate of the reaction

$$2SO_2\ \left(g\right)\ +\ O_{2\ }\left(g\right)\ \leftrightarrow\ 2SO_{3\ }\left(g\right)\ +\ \Delta$$ Increasing pressure will:

Increase the rate of the reaction

$$2SO_2\ \left(g\right)\ +\ O_{2\ }\left(g\right)\ \leftrightarrow\ 2SO_{3\ }\left(g\right)\ +\ \Delta$$ Increasing temperature will:

Increase the rate of the reaction

Kinetics

Authored by Allison Breaux

Chemistry

9th - 12th Grade

NGSS covered

Used 8+ times

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Kinetics

Which letter corresponds with the potential energy of the reactants? (a)

Which letter corresponds with the potential energy of the products? (a)

Which letter corresponds with the activation energy? (a)

Which letter corresponds with the ΔH\Delta HΔH ? (a)

Which letter corresponds with the energy of the activated complex? (a)

2NOCl (g) ↔\leftrightarrow↔ 2NO (g) + Cl2 (g)How does the reaction shift if [NOCl] is increased?

2NOCl (g) ↔\leftrightarrow↔ 2NO (g) + Cl2 (g)How does the reaction shift if [NO] is decreased?

2NOCl (g) ↔\leftrightarrow↔ 2NO (g) + Cl2 (g)How does the reaction shift if [Cl2] is increased?

2NOCl (g) ↔\leftrightarrow↔ 2NO (g) + Cl2 (g)How does the reaction shift if pressure is increased?

2CH4 (g) ↔\leftrightarrow↔ C2H2 (g) + 3H2 (g) + Δ\DeltaΔ Given the reaction above, which way would the reaction shift if the temperature is decreased?

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Which letter corresponds with the potential energy of the reactants?

(a)

Which letter corresponds with the potential energy of the products?

(a)

Which letter corresponds with the activation energy?

(a)

Which letter corresponds with the $\Delta H$ ?

(a)

Which letter corresponds with the energy of the activated complex?

(a)

2NOCl (g) $\leftrightarrow$ 2NO (g) + Cl₂ (g)
How does the reaction shift if [NOCl] is increased?

2NOCl (g) $\leftrightarrow$ 2NO (g) + Cl₂ (g)
How does the reaction shift if [NO] is decreased?

2NOCl (g) $\leftrightarrow$ 2NO (g) + Cl₂ (g)
How does the reaction shift if [Cl₂] is increased?

2NOCl (g) $\leftrightarrow$ 2NO (g) + Cl₂ (g)
How does the reaction shift if pressure is increased?

2CH₄ (g) $\leftrightarrow$ C₂H₂(g) + 3H₂ (g) + $\Delta$
Given the reaction above, which way would the reaction shift if the temperature is decreased?