Chemical Reactions Flashcard Review

Front

What is the right part of a chemical equation called?

Back

Products

Front

What type of reaction is represented by the equation O2(g) + 2 H2(g) → 2 H2O(g) + Energy?

Back

Exothermic

Front

How can you determine if a chemical equation is balanced?

Back

By ensuring that the number of atoms of each element is the same on both sides of the equation.

Front

What coefficient for O2 demonstrates the law of conservation of mass in the equation CH4(g) + __O2(g) → CO2(g) + 2H2O(g)?

Back

2

Front

What type of energy change occurs when ammonium chloride dissolves in water, causing the temperature of the surroundings to drop?

Back

Endothermic

Front

Define a chemical reaction.

Back

A process in which substances (reactants) are transformed into different substances (products).

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

Front

What is an endothermic reaction?

Back

A reaction that absorbs energy from its surroundings, resulting in a temperature drop.

Front

What is an exothermic reaction?

Back

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

Front

What does it mean for a chemical equation to be balanced?

Back

It means that the number of atoms for each element is equal on both sides of the equation.