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The reaction A(g) rarr B(g) + 2C(g) is ...

The reaction A(g) `rarr` B(g) + 2C(g) is a first order reaction with rate constant `2.772 xx 10^(-3) S^(-1)` . Starting with 0.1 mole of A in 2 litre vessel, find the concentration of A after 250 sec when the reaction is allowed to take place at constant pressrue at 300 K.

A

0.0125 M

B

0.025 M

C

0.05 M

D

0.125 M

Text Solution

Verified by Experts

`t_(1//2) = (0.693)/(k) = (0.693)/(2.772 xx 10^(-3)) = 250` sec
Since volume is changing therefore half-life should be defined on the basis of moles, so moles of A remaining after 250 sec. Also final volume of the container.
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