Pure substances have definite and constant physical and chemical properties, such as melting point, boiling point, density and chemical reactivity. Examples include elements like oxygen, gold and ...

What is a pure substance in chemistry? Learn about pure and impure substances in this KS3 chemistry guide from BBC Bitesize.

Classifying Matter: A Virtual Lab Teachers: Link to the PD session overviewing this activity Teachers: Request an Answer KEY Learning Objectives: Students will learn how to categorize matter as either ...

The laws of thermodynamics describe the relationship of heat and other forms of energy. In this course, the following concepts are introduced: the definition of systems; the first and second laws of ...

Doctoral students have described a new selective biocatalyst in an interdisciplinary and inter-university collaboration. The ...

A solution, on the other hand, may remain of constant composition when attempts are made to fractionate it by a single method, for example, by distillation under a given pressure, but generally ...

Description: Properties of pure substances, work and heat, first and second laws of thermodynamics, entropy, irreversibility and availability, power and refrigeration cycles, thermodynamic relations ...

Researchers have discovered pure organic substances exhibiting the quantum spin liquid state. Water loses kinetic energy as it is cooled, and when water molecules become unable to move, water ...

What is a pure substance in chemistry? Learn about pure and impure substances in this KS3 chemistry guide from BBC Bitesize.