Question

for the reaction 2A + B -----> 3C + D.if the volume of vessels are half.find the new rate of reaction.

Answer 1

The rate of reaction r for the reaction A→B is given by :

r=k[A],

where k is the rate constant and [A] is the concentration of the reactant.(I've assumed the reaction to follow first order kinetics.)

So r is directly proportional to the concentration of the reactant,i.e. rate increases on increasing reactant concentration.

However, the concentration of A is actually in moles/Litre, which is moles per unit volume.

Hence, r is inversely proportional to the volume and the rate decreases on increasing volume of the reaction vessel.