For a chemical reaction R → P, the variation in the concentration (R) vs. time (t) plot is given as,
(i) Predict the order of the reaction.
(ii) What is the slope of the curve?
(i) The variation in the concentration (R) vs. time (t) plot shown here represents a zero order reaction, for which the rate of the reaction is proportional to zero power of the concentration of the reactants.
(ii) For a zero-order reaction, rate constant is given as,
k = [R]o - [R]t
So, the slope of the curve for the variation in the concentration (R) vs. time (t) plot is equal to the negative of the rate constant for the reaction.
What is the effect of temperature on chemisorption?
Chemisorption increases with increase in temperature at a certain level and then starts decreasing.
The following data were obtained during the first order thermal decomposition of SO2Cl2 at a constant volume :
SO2Cl2 (g) → SO2 (g) + Cl2 (g)
|
Experiment |
Time/s−1 |
Total pressure/atm |
|
1 |
0 |
0·4 |
|
2 |
100 |
0·7 |
Calculate the rate constant.
(Given : log 4 = 0·6021, log 2 = 0·3010)
The thermal decomposition of SO2Cl2 at a constant volume is represented by the following equation:
Following data are obtained for the reaction :
N2O5 → 2NO2 + ½O2
| t/s | 0 | 300 | 600 |
| [N2O5]/mol L–1 | 1.6 × 10–2 | 0.8 × 10–2 | 0.4 × 10–2 |
(a) Show that it follows first order reaction.
(b) Calculate the half-life.
(Given log 2 = 0.3010 log 4 = 0.6021)
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