Question

g consider the reaction: 2no(g) 2hw n2 2h2ousing standard absolute entropies at 298 k, calculate the entropy change for the system when 2.05 moles of react at standard conditions.

Answer 1

g consider the reaction: 2no(g) 2hw n2 2h2ousing standard absolute entropies at 298 k,  the entropy change for the system when 2.05 moles of react at standard conditions is -851.958 J/K .

2NO(g) + 2H2(g) ----> N2(g) + 2H20(l), Temperature = 298 K, standard absolute entropies of the components of the reaction : NO = 210.5 J/mol K,N2 = 191.6 J/mol K,H2 = 130.5 J/mol K,H20 = 69.9 J/mol K. Sosystem  =  -350.6 J/molK * 2.43mol = -851.958 J/K . Hence, Sosystem = -851.958 J/K Entropy Change is a characteristic that evaluates how chaos or unpredictability have evolved within a thermodynamic system. It's to do with how energy or enthalpy is generated throughout work. More randomness in a thermodynamic system indicates the high entropy. Entropy can be regarded of as an approximate measure of the quality of energy, with lower entropy suggesting higher quality. Lower entropy energy stored in an organized way (the efficient library). The arbitrary library energy will be stored in a chaotic manner, which has a high entropy.

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