Rates of Reactions

Front

What is a reaction rate?

Back

The speed at which reactants are converted into products in a chemical reaction.

Front

What is an exothermic reaction?

Back

A reaction that releases energy, usually in the form of heat, to the surroundings.

Front

What is an endothermic reaction?

Back

A reaction that absorbs energy from the surroundings.

Front

What is activation energy?

Back

The minimum energy required for a chemical reaction to occur.

Front

What role do catalysts play in chemical reactions?

Back

They increase the rate of a reaction by lowering the activation energy without being consumed.

Front

What is the collision theory?

Back

A theory that states that for a reaction to occur, reactant particles must collide with sufficient energy and proper orientation.

Front

What factors affect the rate of a chemical reaction?

Back

Concentration of reactants, temperature, surface area, and presence of catalysts.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; it is conserved.

Front

What are signs that a chemical reaction has occurred?

Back

Change in color, formation of a precipitate, evolution of gas, and change in temperature.

Front

What is a chemical equation?

Back

A symbolic representation of a chemical reaction showing the reactants and products.