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

\text{NH}_3

gas on a heated tungsten surface gave the following results:

Initial pressure $P_0$ $(\text{mm Hg})$	$65$	$105$	$y$	$185$
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}