Question

during hydrogenation of an alkene pressure of hydrogen gas pressure of hydrogen gas is decreased from 2atm to 1atm in 50 minutes. The rate of reaction would be

Answer 1

Answer:

Rate of reaction=

timetaken

changeinpressure

=

75×60

2−1.1

atm/sec

=2×10

−4

atm/sec

so convert to mol/sec

Pv=nRT

V

n

=

RT

P

(

v

n

)/sec= molarity per second=

RT

P

/sec

since pressure/second is rate.

(

v

n

)/sec=

0.0821×300

2×10

−4

=8.12×10

−6

mol/sec

Thus, the rate of the reaction is 8.12×10

−6

mol/sec