At 373 K, a gaseous reaction

A(g) ->2B(g) + C(g) is found to be of first order. Starting with pure A, the total pressure at the end of 10 min was 176 mm Hg and after a long time when A was completely dissociated, it was 270 mm Hg. Then pressure of A at the end of 10 minutes was:

Option 1 -  94mm

Option 2 - 47mm

Option 3 - 43mm

Option 4 - 90mm

5 Views|Posted 5 months ago

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Answered by

Alok Kumar Singh | Contributor-Level 10

5 months ago

Correct Option - 2

Detailed Solution:

A ->2B + C

t = 0 a 0 0

t = 10 a – x 2x x

t -> $\infty$ 0 2a a

$∴$ $\begin{array}{l} a + 2 x \propto 176 \\ 3 a \propto 270 \\ a \propto 90 \\ 2 x \propto 86 \\ x \propto 43 \\ a - x \propto 90 - 43 \\ a - x \propto 47 \end{array}$

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At 373 K, a gaseous reaction A(g) ->2B(g) + C(g) is found to be of first order. Starting with pure A, the total pressure at the end of 10 min was 176 mm Hg and after a long time when A was completely dissociated, it was 270 mm Hg. Then pressure of A at the end of 10 minutes was:

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