Question

A gaseous reaction shows increase in pressure from 100mm to 120mm in 5 minutes

Answer 1

Given the reaction is
..................................A2(g) …..............=......B(g)...... +....... 1/2C(g)
..............................100mm.......................0........................0 ….(initially)
................................100-p.....................p....................p/2....(after 5 minutes)
total pressure=(100-p)+p+p/2=120mm(given)
p/2=20
p=40mm
so rate of disappearence of A2=40mm/5min
and if we know the temperature and volume of the mixture, we can alsom calculate the amount(mole) of A2 disappeared .