Short Answer Type(i) State variables : The measurable properties required to describe the state of the system are called state variables. For example temperature, pressure, volume, composition etc. are state variables.
(ii) State functions: A state function is a property of the system whose value depends on only upon the state of the system and is independent of the path or manner by which the state is reached. For example, pressure, volume, temperature, internal energy (E), enthalpy (H), entropy (S) etc. are state functions.
Long Answer TypeWhat do you understand by:
(i) Isothermal process
(ii) Adiabatic process
(iii) Isobaric process
(iv) Isochoric process
(v) Cyclic process?
Short Answer TypeClassify the following processes as reversible or irreversible:
(i) mixing of two gases by diffusion.
(ii) dissolution of sodium chloride in water
(iii) evaporation of water at 373 K at 1 atm pressure
(iv) expansion of a gas in vacuum.
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