Question

25.00 g of steam at 373 K is added to 390 g H2O(l) at 298 K at constant pressure of 1 bar. Is the final state of the system steam or water? Calculate (delta)S for the process. Assume that the final state is liquid water. If this is not the case, the calculated temperature will be greater than 373 K.

Answer 1

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Solution

at373 k Given 25 team at298k ot 390 3 20 75.29/ JImot k 40650 J mst vap Sat ution step 1 reulting Cesting Calculat water tempesature 33 betwean and 248K Steb2 wate from To Heat AS water Tota T.J 29 to L condensins the Steam skeam frm 373 to T7 Calculation T Set3 tod, x15 29J mtk 25 3 T) 373k T39mrt 25 18.02 3 35 K 75 29 18 18

siep3 AS) steam J T n 4Hvap Tvap Trat 335 7S 2915 259 X 373 mdi met 373 18.D29mst S-36 11 22 k) -1 62.58 J) mot ic As) watei Sepy Tbusiun 335 3৭० 9 7S. 29 J 298 mk 190. q JIk Stehy 28 34 JIk +Ve Value A5 Total 162. 58 t 190.9 S190 ntancous proc es

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