Calculate the change in entropy when 108 ml of hot (97 oC) water added to 36...

Calculate the change in entropy when 108 ml of hot (97 oC) water added to 36 ml cold (5 oC) water in a closed Styrofoam cup given that C_p (H₂O, l) = 75.5 J/(mol * K)

Expert Solution

ans) given Cp = 75.5j/mol*k , V1 = 108ml ,V2 = 36ml, T1 = 97+ 273 =370K,T2 = 5+ 273 =278K

S = Cv *2.303 * log T1 / T2 + R * 2.303 * log V1 /V2

WE know that Cp -Cv =R

Cp - R = Cv

75.5 - 8.314 = 67.186 J/mol k = Cv

S = 2.303 * 67.186 *log 370 / 278 + 8.314 *2.303 *log 108 /36

=19.2019 +19.6242

= 38.8261 j/mol k

thank u

queen_honey_blossom answered 2 years ago

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