At 300 K the half‐life a sample of a gaseous compound initially at 1atm is 100 sec . When the pressure is 0.5 atm the half‐life is 50 sec . The order of reaction is

Question

At 300 K the half‐life a sample of a gaseous compound initially at 1atm is 100 sec . When the pressure is 0.5 atm the half‐life is 50 sec . The order of reaction is (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

For a zero order reaciton, t1 / 2 propto initial concentration ⇒ t 1 / 2 propto pressure Since, half life decreases to half with similar decrease in pressure. Hence, the order of reaction is zero.

Q. At $300 K$ the half‐life a sample of a gaseous compound initially at $1 a t m$ is $100 sec$ . When the pressure is $0.5 a t m$ the half‐life is $50 sec$ . The order of reaction is

For a zero order reaciton,
$t_{1/2} \propto$ initial concentration
$\Rightarrow t_{1/2} \propto$ pressure
Since, half life decreases to half with similar
decrease in pressure. Hence, the order of
reaction is zero.

Q. At 300K the half‐life a sample of a gaseous compound initially at 1atm is 100sec . When the pressure is 0.5atm the half‐life is 50sec . The order of reaction is

For a zero order reaciton, t1/2​∝ initial concentration ⇒t1/2​∝ pressure Since, half life decreases to half with similar decrease in pressure. Hence, the order of reaction is zero.

Q. At $300 K$ the half‐life a sample of a gaseous compound initially at $1 a t m$ is $100 sec$ . When the pressure is $0.5 a t m$ the half‐life is $50 sec$ . The order of reaction is

For a zero order reaciton,
$t_{1/2} \propto$ initial concentration
$\Rightarrow t_{1/2} \propto$ pressure
Since, half life decreases to half with similar
decrease in pressure. Hence, the order of
reaction is zero.