2024-2025 (H) Review for Flashcard #5, Semester 1

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs energy from its surroundings, usually in the form of heat.

Front

What is the definition of a homogeneous mixture?

Back

A homogeneous mixture is a mixture in which the composition is uniform throughout, such as air or saltwater.

Front

What is a particle diagram?

Back

A particle diagram visually represents the arrangement and types of particles in a substance, helping to classify it as an element, compound, or mixture.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is a substance formed when two or more different types of atoms bond together.

Front

How do you calculate the heat absorbed during a phase change?

Back

The heat absorbed during a phase change can be calculated using the formula: Q = m * H, where Q is the heat absorbed, m is the mass, and H is the heat of fusion or vaporization.

Front

What is the heat of fusion for ice?

Back

The heat of fusion for ice is 334 J/g, which is the amount of energy required to convert ice at 0°C to water at 0°C.

Front

What is an example of a compound?

Back

Water (H2O) is an example of a compound, as it is made up of two hydrogen atoms and one oxygen atom.

Front

What is an example of a heterogeneous mixture?

Back

A salad is an example of a heterogeneous mixture, as its components can be easily distinguished and separated.

Front

What is the classification of air?

Back

Air is classified as a homogeneous mixture because it consists of various gases that are uniformly mixed.

Front

What does it mean for a reaction to be exothermic?

Back

An exothermic reaction is a chemical reaction that releases energy, usually in the form of heat, to its surroundings.