Which of the following processes takes place | vedclass

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(C) Entropy is a measure of the randomness or disorder of a system. $\Delta S < 0$ implies a decrease in entropy,which occurs when a system becomes mo

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$NH_{3(g)} + HCl_{(g)} 	o NH_4Cl_{(s)}$

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(C) Entropy is a measure of the randomness or disorder of a system. $\Delta S In option $A$,solid to gas transition increases disorder. In option $B$,dissolution increases entropy due to mixing. In option $D$,mixing of gases increases entropy. In option $C$,two moles of gaseous reactants form one mole of solid product. Since the solid state is much more ordered than the gaseous state,the entropy of the system decreases.

$a$. Liquid to vapor conversion	$1$. $\Delta S = 0$
$b$. Reaction not spontaneous at any temperature,$\Delta H = (+)$	$2$. $\Delta S = (+)$
$c$. Reversible expansion of an ideal gas	$3$. $\Delta S = (-)$

Which of the following processes takes place with a decrease of entropy?

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$a$. Liquid to vapor conversion $1$. $\Delta S = 0$
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$c$. Reversible expansion of an ideal gas $3$. $\Delta S = (-)$

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