Unit 4 - Chemical Reactions Review

Front

What is the effect of increasing surface area on the rate of a chemical reaction?

Back

Increasing the surface area of reactants increases the rate of reaction by allowing more particles to collide, leading to more successful reactions.

Front

How many moles of iron are needed to react with oxygen to produce 2 moles of iron(III) oxide?

Back

4 moles of iron are needed.

Front

What type of chemical reaction is represented by the equation C3H8 + 5O2 → 3CO2 + 4H2O?

Back

This is a combustion reaction.

Front

Why does increasing temperature increase the rate of a reaction?

Back

Higher temperature increases both the frequency and energy of particle collisions, leading to more effective reactions.

Front

What is the mole ratio of ethane (C2H6) to oxygen (O2) in the reaction 2 C2H6 + 7 O2 → 4 CO2 + 6 H2O?

Back

The mole ratio of ethane to oxygen is 2:7.

Front

Define a combustion reaction.

Back

A combustion reaction is a chemical reaction that occurs when a substance reacts with oxygen, producing heat and light.

Front

What is the role of catalysts in chemical reactions?

Back

Catalysts speed up chemical reactions by lowering the activation energy without being consumed in the process.

Front

Explain the concept of activation energy.

Back

Activation energy is the minimum energy required for a chemical reaction to occur.

Front

What is a synthesis reaction?

Back

A synthesis reaction is a type of chemical reaction where two or more reactants combine to form a single product.

Front

What is a decomposition reaction?

Back

A decomposition reaction is a type of chemical reaction where a single compound breaks down into two or more simpler products.