Question

1. Consider intermolecular forces and kinetic energies with respect to a solid and a liquid. Explain why molecules in a liquid are free to move past each other, while molecules in a solid are held in fixed positions.

Answer 1

exesto london > © The differences in the properties of a solide, liquid or gas reflect the straingths of the attractive forces between the atoms, molecules or ions that makeup each phase. The phase in which a substance exists depend on the relative extends of its intermale cular forcoes (IMFs) and the kinetic energy of its molecules. IMFs are the various forces of attraction that may between the atoms and molecules of a substance. Due to electrostatic phenomena. Vander Waals forces (Dipole-dipole interactions, hydrogen bonding dispersion forces), ion-depole interactions are considered as IMFs. These forces serve to hold particles close together whereas the partieles" KE provides the energy required to overcome the attractive forces and this increase the distance between particle. In case of solid as IMFs are much greater with compare to kE's of the particles solid are held in fired positions. Whereas liquid are free to move passed each other. increasing KE looo liquid increasing IMF * Solid 1000