1. With heat of vaporization of CH2Cl2 = 28 kJ/mol, dS for 42 g CH2Cl2 at 39.8 oC would be,
B. 44 J/K
Detailed :
dS = dH/T
moles = 42 g/84 g/mol = 0.5 mol
dH = 28 x 0.5 = 14 kJ
T = 39.8 + 273 = 312.8 K
feed values,
dS = dH/T = 42 x 28/84 x 312.8 = 44 J/K
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