Question

A student forgot to add the reaction mixture to the round bottomed open flask at `27^(@) C` and put it on the flame After a lapse of time he realized his mistake using a pyrometer he found the temperature of the flask was `477^(@)C` What fraction of air would have been expelled out ? .

Answer 1

`V_(1)/T_(1)=V_(2)/T_(2)`
`T_(1)=27+273=300 K`
`T_(2)=477+273=750 K`
`V_(1)/300=V_(2)/750`
`V_(1)/V_(2)=300/750=2/5`
Fraction of air expelled `=1-2/5=3/5`