Thermodynamics Criteria of Spontancity
Criteria of Spontancity All Spontaneous processes are quantitatively decided by temperature, enthalpy change and entropy change. हिंदी - सभी सहज प्रक्रियाएं मात्रात्मक रूप से तापमान, थैलेपी परिवर्तन और एन्ट्रापी परिवर्तन द्वारा तय की जाती हैं। मराठी - सर्व उत्स्फूर्त प्रक्रिया तपमान, एन्थॅल्पी बदल आणि एन्ट्रोपी बदलांद्वारे परिमाणानुसार ठरविल्या जातात. (1) Spontaneity and enthalpy change (∆rH) The value of enthalpy change describes the spontaneity of process quantitatively as ∆H = +ve Non-spontaneous ∆H = 0 Equilibrium state ∆H = -ve Spontaneous (2) Spontaneity and total entropy change (∆S) ∆S total = ∆S system + ∆S surrounding The value of total entropy change describes the spontaneity of process quantitatively as ∆S total = +ve Spontaneous ∆S total = 0 Equilibrium ∆S total = -ve Non-spontaneous (3) Spontaneity and Gibbs free energy (G) In most of the chemical reactions, change in enthalpy and entropy occcurs simultaneously. Thus, we can't decide the spontaneity of process...