Paragraph Styles culate the entropies of vaporization in J K1 mol1 of the follow

Question

Paragraph Styles culate the entropies of vaporization in J K1 mol1 of the following substances, from their boiling points enthalpies of vaporization. Boiling Point /K 353 334 373 30.8 29.4 40.6 38.5 C&Hs; CH3Cl H20 0 terms of the structure of the liquids, suggest reasons the higher values observed for H0 and CHsOH Calculate G' at 25 °C for the following fermentation reaction: The standard Gibbs energies of formation of glucose, ethanol and carbon dioxide are given in Appendix D Glucose Also use the data in Appendix Daaidler text book) to calculate S° for the fermentation reaction. Ethanol Calculate the entropy and Gibbs energy change for the conversion of 1 mol of liquid water at 100 C and 1 bar pressure into vapor at the same temperature and a pressure of 0.1 bar. assume ideal behaviour. The heat of vaporization of water at 100 °C is 40.6 kJmol At 3000 K the equilibrium partial pressure of CO, CO and Oz are 0.6, 0.4 and 0.2 atm, respectirely Calculate C; at 3000 K for the reaction 5. From the data in appendix D, deduce the AG' and K- values for the following reactions at 25.o c. 6. Calculate K: and Ks for esch of the reaction in the previous assuming total pressure of1

Explanation / Answer

1. In terms of the structure of the liquids, The higher values for H2O and C2H5OH is observed in boiling points and enthalphy of vapourisation. This is due to the abnormal behaviour of H2O and C2H5OH for the presence of high electronegative O-atom. Due to polar nature of these two molecule it forms strong hydrogen bond within their structure.

So, with the formation of strong hydrogen bond, these two molecule form giant molecular structure. And that's the reason they show high value in boiling points and enthalphy of vapourisation.

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