Entropy is a measure of the disorder of an isolated system. How is it useful in predicting whether a process is spontaneous, non-spontaneous or in equilibrium?

The spontaneity of a process is expressed in terms of a change in Gibbs energy. How is it useful in predicting the feasibility of a process?

The spontaneity of a process is expressed in terms of a change in Gibbs energy. a) What is meant by a change in Gibbs energy of a system? b) How is it related to the enthalpy and entropy of a system? c) How is it useful in predicting the feasibility of a process?

Adsorption of a gas on the surface of solid is generally accompanied by decrease in entropy. Still it is a spontaneous process. Explain.

For the melting of ice at '25^circ C' : 'H_2 O(s) rarr H_2 O(l)' the enthalpy of fusion is '6.97 kJmol^(-1)', and entropy of fusion is '25.4 J mol^(-1) K^(-1)'. Calculate the free energy change and predict whether melting of ice is spontaneous or not at this temperature.

Most of the naturally occuring processes are spontaneous. Exothermic reactions associated with a decrease in entropy are spontaneous at lower temperatures. Justify on the basis of Gibbs equation.

Enthalpy and Entropy changes of two reactions are given below: Find out whether they are spontaneous or not at 27^oC . Justify. a) DeltaH = 26 kJ/mole, DeltaS = 8.3 J/K/mole b) DeltaH=-393.4 kJ/mole, DeltaS = 6 J/K/mole

The spontaneity of a process is expressed in terms of a change in Gibbs energy. How is it related to the enthalpy and entropy of a system?