Advertisements
Advertisements
प्रश्न
A first order reaction is 50% complete in 25 minutes. Calculate the time for 80% completion of the reaction.
Advertisements
उत्तर
`t_{1//2} = 25 ` minutes ⇒k = `0.693 /{25 "mins"}`
K = `2.303/25 = 2.303/tlog 100/{a_1} `
⇒ `0.693/25 = 2.303/t log 100/20` 80% completion
`t = 2.303/0.693 xx 25 xx 0.6990`
t = 57.3 mins
APPEARS IN
संबंधित प्रश्न
The following data were obtained during the first order thermal decomposition of SO2Cl2 at a constant volume.
\[\ce{SO2Cl2_{(g)} -> SO2_{(g)} + Cl2_{(g)}}\]
| Experiment | Time/s–1 | Total pressure/atm |
| 1 | 0 | 0.5 |
| 2 | 100 | 0.6 |
Calculate the rate of the reaction when total pressure is 0.65 atm.
For the decomposition of azoisopropane to hexane and nitrogen at 543 K, the following data are obtained.
| t (sec) | P(mm of Hg) |
| 0 | 35.0 |
| 360 | 54.0 |
| 720 | 63.0 |
Calculate the rate constant.
Following data are obtained for reaction :
N2O5 → 2NO2 + 1/2O2
| t/s | 0 | 300 | 600 |
| [N2O5]/mol L–1 | 1.6 × 10-2 | 0.8 × 10–2 | 0.4 × 10–2 |
1) Show that it follows first order reaction.
2) Calculate the half-life.
(Given log 2 = 0.3010, log 4 = 0.6021)
A first order reaction takes 20 minutes for 25% decomposition. Calculate the time when 75% of the reaction will be completed.
(Given : log = 2 = 0·3010, log 3 = 0·4771, log 4 = 0·6021)
Show that the time required for 99.9% completion of a first-order reaction is three times the time required for 90% completion.
Which of the following graphs is correct for a first order reaction?
A first order reaction is 50% complete in 20 minute What is rate constant?
The reaction \[\ce{SO2Cl2(g) -> SO2(g) + Cl2(g)}\] is a first-order gas reaction with k = 2.2 × 10−5 sec−1 at 320°C. The percentage of SO2Cl2 is decomposed on heating this gas for 90 min, is ______%.
The following data were obtained during the decomposition of SO2Cl2 at the constant volume. SO2Cl2 →SO2(g) + Cl2(g)
| Time (s) | Total Pressure (bar) |
| 0 | 0.5 |
| 100 | 0.6 |
Calculate the rate constant of the reaction.
Write the equation for integrated rate law for a first order reaction.
