CHEM 101 Study Guide - Midterm Guide: Molality, Joule, Freezing-Point Depression
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Please attempt the practice midterm questions on your own before looking at the answer key:) Multiple choice: calculate the standard entropy change for the following reaction, Cu(s) + 1/2 o2(g) cuo(s) given that so[cu(s)] = 33. 15 j/k mol, so[o2(g)] = 205. 14 j/k mol, and so[cuo(s)] = 42. 63 j/k mol (a) 93. 09 j/k (b) 93. 09 j/k (d) 195. 66 j/k: the following general reaction is not product-favoured at room temperature. A + b c + d ho = +50. 0 kj and so =+100. The vapor pressure of water at 25. 0 c is 23. 80 mm hg. The molality of the urea solution is: 0. 267, 5. 60, 0. 261, 0. 0157, 0. 0160. If h of a process is positive and s of the same process is positive what can you conclude about the spontaneity of the process? a) b) nonspontaneous reaction c) cant conclude with information given.