Relationship between the rate of reaction and collision frequency: If Z is the collision frequency and f is the fraction of molecules whose collisions are effective, then evidently: Rate of…
Concept of activation energy: The minimum extra amount of energy absorbed by the reactant molecules so that their energy becomes equal to threshold value is called activation energy. In other…
Effect of temperature on reaction rate: Temperature has marked effect on the rate of reaction. For most of the reactions the rates of reaction becomes nearly double or even more…
The rate of reaction having collision frequency Z and fraction f of molecules will be: Rate of reaction = – dx / dt = Z x f The collision frequency…
The combustion of fuels like coal in the presence of air or oxygen is thermodynamically feasible (C + O2 ———–> CO2) because ∆G is negative, yet the fuels are quite…
We are given that: k1 = 1.2 x 10-3 sec-1 T1 = 30 + 273 = 303 K k2 = 2.1 x 10-3 sec-1 T2 = 40 + 273 =…
We are given that: When T1 = 27 + 273 = 300 K Let k1 = k When T2 = 37 + 273 = 310 K k2 = 2 k…
Some reactions do not take place in the dark but take place only in the presence of light or some other radiation. Such reactions are known as ‘photochemical reactions’. For…
Luminiscence: The emission of light during a process other than by the action of heat i.e. emission of cold light is called Luminiscence. This can be of following different types:…
Photochemistry plays an important role in everyday life. Some of the examples are given below: 1. In vision 2. In photosynthesis 3. In the manufacture of many inorganic compounds. For…
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