1. gases are made up of molecules which are relatively far apart.2. the molecules are in motion at high speeds.3. the molecular collisions are perfectly elastic.4. increase in temperature increases the kinetic energy of the molecules. which of the above assumptions accounts for the compressibility of gases as compared to liquids and solids? a) 1b) 2c) 3d) 4e) 2 and 3f) 3 and 4

A

Explanation:

Molecules of a gas are relatively more compressible than those of liquids and solids because they are relatively far apart without any intermolecular forces between them. However, at lower temperature and higher pressure, there is now a significant intermolecular interaction between the gas molecules and they are no longer relatively far apart. Hence they are more compressible than liquids and solids which already possess significant intermolecular interaction and thus a definite volume.

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.