The gaseous reaction A2→2A is first order in A2. After 12.3 minutes 65% of A2 remains undecompensed. How long will it take to decompose 90% of A2? What is the half life of the reaction?
Observation No. | Time (in minute) | P_x (in mm of Hg) |
1 | 0 | 800 |
2 | 100 | 400 |
3 | 200 | 200 |
Time (min) | 0 | 20 | 40 | 60 |
Total pressure (mm Hg) | 400 | 500 | 587.6 | 664 |
t (sec) | P(mm of Hg) |
0 | 35.0 |
360 | 54.0 |
720 | 63.0 |
Experiment | Time/s^{-1} | Total pressure/ atm |
1 | 0 | 0.5 |
2 | 100 | 0.6 |
t(s) | 0 | 900 | 1800 |
[A] | 50.8 | 19.7 | 8.62 |
[A], mol L^{-1} | [B], mol L^{-1} | Initial rate, mol L^{-1}s^{-1} at | Initial rate, mole L^{-1}s^{-1}, at |
300K | 320K | ||
2.5\times 10^{-4} | 3.0\times 10^{-5} | 5.0\times 10^{-4} | 2.0\times 10^{-3} |
5.0\times 10^{-4} | 6.0\times 10^{-5} | 4.0\times 10^{-3} | - |
1.0\times 10^{-3} | 6.0\times 10^{-5} | 1.6\times 10^{-2} | - |