Reaction Profiles

• Chemistry
• Upper Secondary (Key Stage 4)
• GCSE

Reaction Profiles

What is a reaction profile?

1. The rate at which a reaction occurs.
2. A graph that shows the energy changes during a chemical reaction.
3. A summary of the reaction equation.
4. A list of reactants and products.

What does the energy axis represent in a reaction profile?

1. The concentration of reactants.
2. The time it takes for the reaction to occur.
3. The volume of the products.
4. The energy of the particles involved in the reaction.

What is the activation energy of a reaction?

1. The energy released in a reaction.
2. The energy stored in the reactants.
3. The total energy change in a reaction.
4. The minimum energy required for a reaction to occur.

What does the peak on a reaction profile represent?

1. The energy of the catalyst.
2. The initial energy of the reactants.
3. The transition state or activated complex.
4. The final energy of the products.

Why are reaction profiles used?

Which of the following statements is true about exothermic reactions?

1. They release heat energy to the surroundings
2. They require a catalyst to occur
3. They have a decrease in temperature
4. They absorb heat energy from the surroundings

In an endothermic reaction, which of the following happens?

1. Heat energy is absorbed from the surroundings
2. It occurs spontaneously
3. Heat energy is released to the surroundings
4. Temperature increases

Which of the following is not an example of an exothermic reaction?

1. Photosynthesis
2. Respiration
3. Burning of wood
4. Neutralization of an acid and a base

What is the energy change in an exothermic reaction?

1. Negative
2. Zero
3. Positive
4. Depends on the type of substance

Which of the following is an example of an endothermic reaction?

1. Digestion of food
2. Formation of rust
3. Burning of gasoline
4. Melting of ice

complete the diagram

make sure to look at the temperature changes to make your reaction profile

look at previous reaction profiles for the answer

Endothermic

6

12

exothermic

What is a reaction profile?

1. The temperature at which a reaction occurs.
2. A list of reactants and products in a chemical reaction.
3. A graph showing the energy changes during a chemical reaction.
4. The speed at which a reaction takes place.

What does the activation energy represent in a reaction profile?

1. The minimum amount of energy required for a reaction to occur.
2. The energy released by the reactants.
3. The energy absorbed by the products.
4. The total energy change during a reaction.

What does the peak on a reaction profile indicate?

1. The starting point of the reaction.
2. The highest energy point in the reaction, representing the activated complex.
3. The energy released during the reaction.
4. The point where the reactants are completely converted to products.

What other subjects are reaction profiles useful for?

Reaction profiles are essential in chemistry.

Reaction profiles provide important information.

Reaction profiles are difficult to understand.

Reaction profiles are unnecessary in chemistry.

Reaction profiles should be taught earlier.

Understanding reaction profiles helps predict reaction outcomes.

Reaction profiles are helpful in predicting reactions.

Reaction profiles are too complex to be useful.

Predicting reaction outcomes doesn't require reaction profiles.

Understanding reaction profiles is a waste of time.

Reaction profiles are useful in identifying energy changes during a reaction.

Reaction profiles provide insights into energy changes.

Reaction profiles are too abstract to be useful.

Energy changes can be identified without reaction profiles.

Identifying energy changes is not important in chemistry.

Reaction profiles aid in explaining reaction rates.

Reaction profiles help understand reaction rates.

Reaction profiles complicate the explanation of rates.

Reaction rates can be explained without reaction profiles.

Explaining reaction rates is irrelevant in chemistry.

Analyzing reaction profiles enhances students' problem-solving skills.

Analyzing reaction profiles improves problem-solving abilities.

Analyzing reaction profiles is too time-consuming for students.

Problem-solving skills don't benefit from analyzing reaction profiles.

Analyzing reaction profiles is not applicable outside of chemistry.