Question

For a gaseous reaction A products, the half-life of the first order
decomposition at 400 K is 150 minutes and the energy of activation is 65.0
kJ mole. 1. The fraction of molecules of A at 400 K have sufficient energy to
give the products is 3.13 x 10^x. Then X is-​

Answer 1

Answer:

A(g)   →    2B(g)   +   C(g)

t = 0                 400                           0                0

t = 20 min         400 - p                     2p               p

Given 400−p+2p+p=1000

          400+2p=1000

          p=300mm

k=201ln400−300400=201ln4

k=fracln210min−1

T1/2=10min

ValueofK=0.0693min−1

After 30 min Partial Pressure of A is 50 mm

After 30 min Partial Pressure of B is 700 mm

After 30 min Partial Pressure of C is 350 mm

After 30 min total pressure become 1100 mm

So all of the above are correct.