Predict the entropy change in- (i) A liquid crystallizes into solid (ii) Temperature of a crystalline solid raised from 0K to 115K

Melting of ice. (Similar examples of such type may be given)

(a) The solid exerts a force equal to its weight on the liquid. (b) The liquid exerts a force of buoyancy on the solid which is equal to the weight of...

(c) decrease if it is taken partially out of the liquid (d) be in the vertically upward direction. EXPLANATION:   The force exerted by the liquid on the solid is equal to the volume...

(b) the forces between the molecules is stronger in solid than in liquids EXPLANATION:   The shape will change only if the molecules have some freedom of movement. In a solid the forces...

(c) decrease if it is taken partially out of the liquid (d) be in the vertically upward direction. EXPLANATION:   The force exerted by the liquid on the solid is equal to the volume...

∆S = q rev/T

The free energy change of a reaction is given by ΔG = ΔH – TΔS  For a reaction to be spontaneous, ΔG should be –ve.  If both ΔH and ΔS are positive...

 Entropy change (∆S) is positive. It is because disorder or degree of freedom increases on mixing.

This is a straight-forward application of Equation 2, followed by substitution of the Appropriate values from a table.   CaCO3(s) → CaO (s) + CO2 (g)  ΔS° = (1 mol) [ΔS° for CaO...

Entropy is a measure of randomness or disorder of a system. If randomness increases entropy increases. (I) Gas at lower pressure has greater randomness thanΔ at high pressure (compressed gas) at...