Chemical Kinetics and Nuclear ChemistryHard

Question

A(g) → B(g) + (α - particles)
(α-particles are helium nuclei, so will form helium gas by trapping electrons)
The radioactive disintegration follows first-order kinetics Starting with 1 mol of A in a 1-litre closed flask at 27oC pressure developed after two half-lives is approximately :

Options

A.25 atm
B.12 atm
C.61.5 atm
D.40 atm

Solution

A(g) → B(g) + (α - particles)
A(g) → B(g) + 2(42He (g))
1 mole        0         0
             2 ×
After two half life mole of A decomposes.
Total moles after 2 half life = = 2.5 mole
pV = nRT
p × 1 = 2.5 × .082 × 300
p = 61.5 atm

Create a free account to view solution

View Solution Free
Topic: Chemical Kinetics and Nuclear Chemistry·Practice all Chemical Kinetics and Nuclear Chemistry questions

More Chemical Kinetics and Nuclear Chemistry Questions

Decrease in atomic number is observed during :...Milk turns sour at 40oC three times as faster as 0oC. Hence Ea in cal of process of turning of milk sour is :...The activation energies of two reactions are E1 and E2 with E1 > E2. If the temperature of the reacting system is inc...The rate equation for the reaction 2A + B → C is found to be: rate k[A][B]. The correct statement in relation to t...The rate of a reaction A + 2B → P is 2 × 10−2 M/ min, when concentrations of each A and B are 1.0 M. If the rate of reac...