LUCIO C OVERS The heat of fusion AH, of benzene (CH) is 10.6 kJ/mol. Calculate the...

Question

Question

Answer 1

Answer #1

Mass of benzene = 78.11 g/mol

Number of moles of benzene in 21 g of benzene = 21/78.11 mol = 0.269 mol

T = 273 + 5.6 = 278.6 K

Now, dS = dHf/T x number of moles = (10.6/278.6) x 0.269 kJ/K = 10.23 J/K

Change in entropy = 10.23 J/K

Answer 2

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