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18 Dec 2019

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Q1. Boiling points Taking the last digit of your student ID number as a key, select the corresponding solvent from the table below. Assume you are using that solvent for the following questions. solve the first one Carbon disulphide

ID numbe Solvent boiling point (1 atm) ΔvapH° / °C /kJ mol-1
0,1 Carbon disulphide 46.3 26.7
2,3 Carbon tetrachloride 76.7 30.0
4,5 Cyclohexane 80.7 30.1
6,7 Diethylether 34.6 27.1
8,9 Acetone 56.0 31.3

(a) Compute the entropy of vaporisation of this solvent. (Briefly, compare the value you obtain with that from Trouton’s rule (ΔvapS° ≈10.5 R). answer this qustion)

Entropy of vaporization= 0.08362 kJ mol-1/K

Entropy of vaporization= 83.62 J mol-1/K

(b) Use the tabulated experimental value of ΔvapH° to estimate the partial pressure (i.e. vapour pressure, in atm) of that solvent at room temperature (25 °C). What implications does this have for safe storage and handling of the solvent?answer this qustion)

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Keith Leannon
Keith LeannonLv2
31 Dec 2019

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