The decompostion \[N{{H}_{3}}\] gas on a heated tungsten surface gave the following results: | ||||||||||
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A) \[x=410\,\,\sec \]
B) \[x=467\,\,\sec \]
C) \[x=490\,\,\sec \]
D) \[x=430\,\,\sec \]
Correct Answer: B
Solution :
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Half life \[\alpha \] Initial pressure So, it must be zero order reaction | |||||||||||||||
\[{{t}_{1/2}}=\frac{{{C}_{O}}}{2k}=\frac{{{P}_{O}}}{2k}\] \[290=\frac{65}{2\,k}\] \[\Rightarrow \]\[k=\frac{65}{2\times 290}=0.112\,\,mm\] of Hg/sec | |||||||||||||||
\[x=\frac{105\times 2\times 290}{2\times 65}=468\,\,\sec \] | |||||||||||||||
\[670=\frac{y\times 2\times 290}{2\times 64}\] \[\Rightarrow \] y = 150 mm of Hg |
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