Property Changes in Chemical Reactions

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

Front

What happens to the mass of substances during a chemical reaction?

Back

The mass of substances remains constant; the total mass of reactants equals the total mass of products.

Front

What is a chemical change?

Back

A chemical change is a process that transforms one or more substances into new substances with different properties.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a reactant?

Back

A reactant is a substance that undergoes a chemical change in a reaction.

Front

What is a product?

Back

A product is a substance that is formed as a result of a chemical reaction.

Front

What role do coefficients play in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of a substance involved in a reaction; they act as multipliers.

Front

What is an example of a chemical change?

Back

An example of a chemical change is rust forming on iron when it reacts with oxygen.

Front

What is an example of a physical change?

Back

An example of a physical change is ice melting into water.

Front

How does temperature affect gas volume in a balloon?

Back

As temperature increases, the volume of gas in a balloon increases due to the expansion of gas particles.