The decomposition of gas on a heated tungsten surface gave the following results: |…

CHEMISTRY · Single correct · A Level · Chemistry · Rate equations · Rate equations

Problem

The decomposition of

\mathrm{NH_3}

gas on a heated tungsten surface gave the following results:

Initial pressure / $\text{mm Hg}$	$65$	$105$	$y$	$185$
Half-life / $\text{s}$	$290$	$x$	$670$	$825$

Calculate approximately the values of

x

and

y

. (a)

x=410\text{ s}

y=115\text{ mm Hg}

(b)

x=467\text{ s}

y=150\text{ mm Hg}

(c)

x=490\text{ s}

y=120\text{ mm Hg}

(d)

x=430\text{ s}

y=105\text{ mm Hg}