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1.25 of sample of C Cl_2F_2 was cooled at a constant pressure of 1 atm. From 320 K to 293 K. During cooling, the volume decreased from 274 to 248 mL.Delta H and DeltaU" for " CCl_2 F_2 " is " (C_p = 80. 7 J mol^(-1) K^(-1)) : |
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Answer» `-22.5 J,- 19.88J` |
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