Question

The heat of vaporization AH, of ethyl aceae4Hs 35.1 kJ/mol. Calculate the change in entropy AS when 4.6 g of ethyl acetate boils at Be sure your answer contains a unit symbol. Round your answer to 2 significant digits

Answer 1

Entropy change during reporisation is calitated by formuler, Asvab - Enthalpy change boiling point Enthalpy change boiling point in Kelvin. Here, Enthalpy change during process number of more & molar enthalpy of rap. (Atrap) be in JorkJ shald 8 man is related by number of mole? formula, number of mole cft Given mass Molar mass Here mass of cuh8O2 =4.6 g

Molar mass of G4 H8O2 21244 +1x8+16*238% 88 9/made Hence. no. of mole of 44802 ma и 3 «Но, Molar mass of Choo. 2 4.bg -0.0523 mole. 888/mole Therefore, Toth enthalpy change during process — miles } щHgo, X ДИ = 0.052335:1 ki . 1 • 8 357 KJ . Ik Ja looo J Total enthalpy change = 1.8357 K = 1835:7 J -77.1°C boiling point 277:1+273•15 K = 350.25 K Hence As cap = enthalpy change during vap. boiling point 1835.7.J 350.25 K 5.24 "K ~ 5.20/k

As youp ༤ 5.2 / Hence thita eof hafeetlea ei abrons .3 acetate as RJ = 5:21 *%20s er 5.2 x 10 K K As=5.2k