In ionic bonding, electrons are completely transferred from one atom to another. In the process of either losing or gaining negatively charged electrons, the reacting atoms form ions. The oppositely charged ions are attracted to each other by electrostatic forces, which are the basis of the ionic bond.
Entropy is a measure of the degree of the spreading and sharing of thermal energy within a system. The entropy of a substance increases with its molecular weight and complexity and with temperature. The entropy also increases as the pressure or concentration becomes smaller.
Entropy of Phase Changes. Sometimes calculating entropy changes using equation (1) is not so complicated. If the temperature stays constant as heat is added or removed, equation (1) is easy to use.During phase changes, as discussed in Enthalpy 4 and 5, the temperature stays constant while the substance accepts or gives up heat, until the phase change is complete.Thus, equation (1) can be applied directly. Predict the entropy change when 100.0 g of liquid benzene (C.ntropy of Phase Changes. Sometimes calculating entropy changes using equation (1) is not so complicated. If the temperature stays constant as heat is added or removed, equation (1) is easy to use.