Explain the terms 'entropy', 'enthalpy' and 'free energy'.

Explain the terms entropy and free energy.Why does entropy of a solid increase on fusion?

Explain the terms ionization enthalpy and electron gain enthalpy.

Gibbs Helmholtz equation relates the enthalpy, entropy and free energy change of the process at constant pressure and temperature as DeltaG=DeltaH-TDeltaS " (at constant P, T)" In General the magnitude of DeltaH does not change much with the change in temperature but the terms TDeltaS changes appreciably. Hence in some process spontaneity is very much dependent on temperature and such processes are generally known as entropy driven process. When CaCO_(3) is heated to a high temperature it decomposes into CaO and CO_(2) , however it is quite stable at room temperature. It can be explained by the fact that

What are the units of entropy and free energy?

Define and explain the term, enthalpy or heat of reactopn.

Explain the term electron gain enthalpy. Discuss the factors which influence its value.

In a reaction P+Q rarr R+S , there is no change in entropy, Enthalpy change for the reaction (DeltaH) is "12 kJ mol"^(-1) . Under what conditions, reaction will have negative value of free energy change?