In a zero order reaction, it takes 342 seconds for 75% of a hypothetical reaction to decompose. Determine the half-life t1/2} in units of seconds. Do not enter units with your numerical answer.

Answer : The half-life is,

Explanation :

First we have to calculate the rate constant for zero order reaction.

The expression used is:

where,

= let initial concentration = 100

= final concentration = 25

t = time = 324 s

k = rate constant = ?

Now put all the given values in the above expression, we get:

Now we have to calculate the half-life.

The expression used is:

Thus, the half-life is,

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.

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