Explain the following observations giving appropriate reason: Ozo…

Question

Explain the following observations giving appropriate reason:
Ozone is thermodynamically unstable with respect to oxygen.

✓

Answer

$2O_3(g) → 3O_2(g)$
Ozone is thermodynamically unstable with respect to oxygen as its decomposition into oxygen results in the liberation of heat $(\triangle \text{H}=-\text{ve})$ and increase in entropy $(\triangle\text{S} =+\text{ve}).$ These two factors reinforce each other, resulting in large $-\text{ve}\triangle \text{G}(=\triangle \text{H}-\text{T}\triangle \text{S})$ for its conversion into oxygen.

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For the reaction
$2NO_{(g)} + Cl_{2(g)} → 2 NOCl_{(g)}$
The following data were collected. All the measurements were taken at $263K:$

Experiment. No.	Initial [NO] (M)	Initial $[Cl_2]\ (M)$	Initial rate of disappearance of $Cl_2$(M/min)
$1$	$0.15$	$0.15$	$0.60$
$2$	$0.15$	$0.30$	$1.20$
$3$	$0.30$	$0.15$	$2.40$
$4$	$0.25$	$0.25$	$?$