Which of the following statements is accurate about gases?

The statement about gases needing to be contained in a closed container to prevent them from escaping is accurate because gases are characterized by their high kinetic energy and the large spaces between their molecules. This nature allows gas particles to spread out and fill any available volume. When a gas is not contained, it will escape into the atmosphere or surrounding area, dispersing until it reaches equilibrium.

This property is essential in various applications, such as in HVAC systems, where refrigerants, often in gas form during certain phases of their cycle, need to be carefully managed within closed systems to maintain efficiency and prevent leaks. Understanding this aspect of gases is crucial for HVAC technicians as they design and maintain systems that rely on gas compression and expansion.

Other statements do not accurately represent the behavior of gases; for instance, gases are typically not always visible, they do not have a definite shape or volume, and they can exist at a wide range of temperatures, not just low ones.