Notes On Gaseous State This page provides you all details about the gaseous state of BSc standard. Concerned problems will be solved at the end of each concept. Continue till the end to find the easiest explanation of every concept you need in this regard . Postulates of Kinetic Theory of Gases: 1. All gas consist of a very large number of minute particles, called molecules. 2. The gas molecules are extremely small in size and are separated by large distance. The actual volume of the gas molecules is thus negligible as compared to the total volume occupied by the gas. 3. The pressure exerted by the gas is due to the bombardment of the molecules on the walls of the vessel. 4. The gas molecules collide with one another and also with the walls of the vessels. These collisions are perfectly elastic and there is no loss of energy during these collisions. 5. The distance between the gas molecules are very large. Thus, there is no effective force of attraction or r
Notes on Phase Rule Introduction: Phase rule is an important generalisation or tool which helps us to predict the condition that must be specified for a system to exhibit equilibrium. Most importantly by the application of this rule it is possible to predict quantitatively the effect of changing pressure, temperature or concentration on a heterogeneous system at equilibrium by means of a diagram called the phase diagram. By about 1874, G.W Gibbs formulated this rule which is F = C-P +2 or F+P = C+2 , where F = number of degrees of freedom, C= Number of components and P = number of phases. Thus phase rule states that the sum total of the number of degrees of freedom and the number of phases exceeds the number of componets by two. 1.Phase: A phase is defined as any homogeneous and physically distinct part of the system separated by definite boundary surface and mechanically separable from other part of the system. Examples illustratin