In this lab, the temperature of chemicals before chemical change and after chemi
ID: 1020795 • Letter: I
Question
In this lab, the temperature of chemicals before chemical change and after chemical change was collected and thus, weather bonds were broken or created was determined. To do this a calorimeter was used; a calorimeter can help us measure heat of chemical reaction. Data: Grou Tria Volum Volum mol H20 mol I e H20 e EtOH Ethanol fraction H20 22. 23. 0.9 5 4 22. 24. 2.2 23.05 22.2 0.169 3 7.07 22.20.3923 4 12.12 17.5 0.67258 S 19.9 7.5 7 9 - I 22. I 26. 22. 27. 5.1 1.10 23 29.6.2 2 20. 21. 1.7 9 19. 22. 2.7 6 19. 24.5.1 10 12 27 24 20 3 8 18 41512 525 9 20. 28. 8.2 22. 26. 4.1 Grou Tria Volum Volum mol H20 mol Acetonitril fraction a T H20 6 14.2 10 10 620 6 0.39444444 0.1919 0.804 21. 18. 3 055555555 22. 211.7 Discussion: out View : Sec . Pages: 1012 Sec 1 Pages:1 of 2 words: 285 of304Explanation / Answer
1.When the mixing of ethanol and water, some heat evolved because some water water hydrogen bonds and ethanol ethanol hydrogen bonds are broken and some water ethanol hydrogen bonds are formed. Itis a exothermic reaction. When reaction accured delta G is negative
4.water-acetonitrile mixing, which show endothermic, represent good contrast in non-ideality of a binary mixture. The microscopic structure observed through the mass-spectrometric analysis of clusters isolated from solution also shows good contrast between these binary mixture as follows:acetonitrile molecules have additional interaction with water clusters; the clustering, the acetonitrile clusters are disintegrated in the presence of water.
when mixing of acetonitrile and water spontanious and delta S is positive
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