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(B) Entropy $(S)$ is a measure of the randomness or disorder of a system. $1$. Process $(a)$: $Br_{2(l)} 	o Br_{2(g)}$. Liquid to gas transition incr

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only $a, b, c, e$

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(B) Entropy $(S)$ is a measure of the randomness or disorder of a system. $1$. Process $(a)$: $Br_{2(l)} 	o Br_{2(g)}$. Liquid to gas transition increases disorder. $\Delta S > 0$. $2$. Process $(b)$: $H_2O_{(s)} 	o H_2O_{(g)}$. Solid to gas transition increases disorder. $\Delta S > 0$. $3$. Process $(c)$: $N_2 \left[ 1 \ atm, 100 ^oC ight] 	o N_2 \left[ 1 \ atm, 150 ^oC ight]$. Heating a gas increases the kinetic energy and randomness of molecules. $\Delta S > 0$. $4$. Process $(d)$: $N_{2(g)} + 3H_{2(g)} 	o 2NH_{3(g)}$. Here,$4 \ moles$ of gas are converted to $2 \ moles$ of gas. The number of moles decreases,so disorder decreases. $\Delta S $5$. Process $(e)$: $CaCO_{3(s)} 	o CaO_{(s)} + CO_{2(g)}$. $A$ solid produces a gas,which significantly increases disorder. $\Delta S > 0$. Therefore,entropy increases in processes $(a)$,$(b)$,$(c)$,and $(e)$.

$a$. 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	$3$. $\Delta S = (-)$

In which of the following processes does entropy increase?

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Match the following processes with their corresponding entropy changes:
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In which of the following processes is the maximum increase in entropy observed?

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