Changing states of matter occur when matter loses or absorbs energy. When a substance absorbs energy; the atoms and molecules move more rapidly and this increased kinetic energy pushes particles far enough that they change form.

Oxygen turns to liquid only when it is kept at very cold temperatures; when it is released under pressure from cold storage, it is converted to a gas.

Furthermore, answer to your question is all gases like oxygen O2, carbon dioxide CO2, Hydrogen H2, N2O , C4H10 , C3H8,Ar ,He ,N2,etc.

The conversion of matter from one state to another is called a phase change. This process occurs when a large amount of energy is gained or lost.

Liquids have their molecules loosely bound and tend to slide over each other. Gases have their molecules not bound at all.

Substances can change between the states of matter by adding or removing heat, also known as the transfer of thermal energy. Adding thermal energy causes a substance's particles to move faster and farther apart; removing thermal energy causes a substance's particles to move slower and closer together.

Plasma is often called “the fourth state of matter,” along with solid, liquid and gas. Just as a liquid will boil, changing into a gas when energy is added, heating a gas will form a plasma – a soup of positively charged particles (ions) and negatively charged particles (electrons).

Like gases, plasmas have no fixed shape or volume, and are less dense than solids or liquids.