Consider the following reaction at 298 K and calculate the following quantities: Consider the following reaction...

Question

Question

Consider the following reaction at 298 K and calculate the following quantities:

Answer 1

Answer #1

dS system = S° product - S° reactant

dS system = S° 2x Al2O3 - [ S° 3 x O2 + S° 4 x Al]

dS system = 2 x 50. 92 - [ 3 x 205.03 + 4 x 28.33]

dS system = 101.84 - [ 615.09 + 113.32]

dS system = -626.57 J/mol.K

dS surr = - dH /T => -(-3351.4 kJ/mol / 298 K)

dS surr = 11.246 kJ/mol.K or 11246 J/mol.K

dS univ = dS system + dS surr

dS univ = - 626.57 + 11246 => 10619 J/mol.K

Answer 2

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