For the decomposition of azoisopropane to hexane and nitrogen at 543 K, the following data are obtained.

t (sec)

P(mm of Hg)

0

35.0

360

54.0

720

63.0

Calculate the rate constant.

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Solution

The decomposition of azoisopropane to hexane and nitrogen at 543 K is represented by the following equation.

After time, t, total pressure,

= 2P₀ − P_t

For a first order reaction,

When t = 360 s,

= 2.175 × 10⁻³ s⁻¹

When t = 720 s,

= 2.235 × 10⁻³ s⁻¹

Hence, the average value of rate constant is

= 2.21 × 10⁻³ s⁻¹

Note: There is a slight variation in this answer and the one given in the NCERT textbook.

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Similar questions

Q. For the decomposition of azoisopropane to hexane and nitrogen at 543 K, the following data are obtained:
t(sec) P(mm of Hg)
0 35.0
360 54.0
720 63.0
Calculate the rate constant.

Q. For the decomposition of azo-isopropane to hexane and nitrogen at

543 K

, the following data are obtained.

$t (s e c)$	$P$ (mm of $H g$ )
$0$	$35.0$
$360$	$54.0$
$720$	$63.0$

Calculate the rate constant.

For the decomposition of azoisopropane to hexane and nitrogen at 543 K, the following data are obtained. Calculate the rate constant.
$\begin{matrix} t (s) & p (m m o f H g) 0 & 35.0 360 & 54.0 720 & 63.0 \end{matrix}$

The following data were obtained during the first order thermal decomposition of SO₂Cl₂ at a constant volume.

Experiment	Time/s⁻¹	Total pressure/atm
1	0	0.5
2	100	0.6

Calculate the rate of the reaction when total pressure is 0.65 atm.

Q. Draw a histogram for the following data.

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For the decomposition of azoisopropane to hexane and nitrogen at 543 K, the following data are obtained. t (sec) P(mm of Hg) 0 35.0 360 54.0 720 63.0 Calculate the rate constant.

For the decomposition of azoisopropane to hexane and nitrogen at 543 K, the following data are obtained.

t (sec)

P(mm of Hg)

0

35.0

360

54.0

720

63.0

Calculate the rate constant.