Does entropy increase or decrease from gas to liquid and gas is dissolved in liquid entropy and does entropy increase from gas to gas?
Your answer is correct for pure substances. For mixtures, however, it is possible that the total entropy (= configurational entropy + ideal-gas contribution) decreases upon evaporation (so-called entropic inversion).
Incidentally, do not use "cal"! It is an ill-defined and outdated unit. The SI unit for energy is the Joule [J].
A gas molecule dissolved in a liquid is much more confined by neighboring molecules than when it’s in the gaseous state. Thus, the entropy of the gas molecule will decrease when it is dissolved in a liquid. Entropy increases as temperature increases and as a substance changes from solid to liquid to gas. Gases have the highest entropy values because they have the greatest freedom of movement. The entropy is decreasing because a gas is becoming a liquid.The entropy increases as the molecules become more disordered as you go from solid to liquid to gas. When solid is converted liquid, the particles are relatively more free to move and randomness increases. Liquid state has more accessible microstates, so more distribution of energy and hence entropy increases. The entropy is decreasing because a gas is becoming a liquid.The entropy decreases (ΔS < 0) as the substance transforms from a gas to a liquid and then to a solid. The process of dissolving increases entropy because the solute particles become separated from one another when a solution is formed. Entropy increases as temperature increases. An increase in temperature means that the particles of the substance have greater kinetic energy. During evaporation, as the liquid state changes to a vapor state, the randomness between the particles increases, due to which the entropy of the system also increases. The entropy of vaporization is then equal to the heat of vaporization divided by the boiling point: According to Trouton's rule, the entropy of vaporization of most liquids has similar values. The typical value is variously given as 85 J/(mol·K), 88 J/(mol·K) and 90 J/(mol·K).
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