Question

oxygen reacts with many different elements to form different molecules. as the energy of matter changes, substances experience changes in their states of matter. choose the two molecules from the list below that contain the greatest kinetic energy
■no (g)
■co (g)
■na₂o (s)
■sio₂ (s)
■h₂o (l)

Explanation:

Kinetic energy is related to the movement of particles. Gaseous substances have higher kinetic energy as their particles move more freely compared to solids and liquids. Among the given options, \(CO(g)\) (carbon monoxide gas) and \(NO(g)\) (nitrogen monoxide gas) are in the gaseous state. Solids (\(SiO_2(s)\), \(Na_2O(s)\)) have lower kinetic energy as particles are more fixed in position, and liquids (\(H_2O(l)\)) have intermediate kinetic energy compared to gases.

Answer:

\(\text{CO (g)}\), \(\text{NO (g)}\)