Question

DO NOT USE REFERENCE VALUES FOR ANY OF THE COMPONENTS. EACH PROBLEM MUCH BE SOLVED FOR USING THE INFORMATION GIVEN.

4) Solid ammonium chloride dissociates according to NH,CI() ► NH (3)+ HCl(e) The dissociation vapor pressureſi.e. Pdissociation = PxH. + PHC) of NH4Cl at 427°C is 608 kPa buta 459°C it has risen to 1115 kPa. Calculate the following: a) The equilibrium constant at 427°C c) The standard enthalpy of reaction A HⓇ and 459°C d) The standard entropy of reaction AS b) The standard reaction Gibbs energy Assume that the vapor behaves as a perfect gas and that A, HⓇ and A. Se are independent of temperature over the range given

Answer 1

NH, cº > NỀ,( 4) + He (8) . At equilibrium Paritz =P Hel, a to Given dissociation - Prity & PHel. lais (427") = 608ka 20 688kPa Ho BT PND = & Hel 2304 ke ab 427% Similiarly = 3 atm . Hey = P Nt = !115 kPa a 5.50 silibzium Constant ab 427° PNH B. He [Mt of Inity till Sot 3 . Sold 17 Equilibrium Const at - (Ano 459°C, ko - PNH PHel PNH XP ankgl. Intell] esta contine 5.50*5.50 = 30.25 (and) Bar The standard reaction Gibbs (R= univers energy at 427° 6 Ago 02 56°=-R linke Go - 8.314 3. mot Klx 10 kxln(g) ER= 8.314 smarki] = -12787.4 Joule/ma) -12.787 KJ /mal.

Tod The standard reaction Gibbs energy - - 8.3147 732 xlns at 4990. T = 20749.67 Jouleme - 20.79967 KJ/mol. Standard enthalpy of reaction S as it is independent Asp of temperature over the range y log K2 = -AH Toen 2.302R [7 - 27 SO, - 4H o 109 30.25 - M2 = 30.25 → AH = 0.52648X2:30348.314 R-8.316 Jison bis 6.245x10-5 12 = 732K Joule 1=7ook = 16 1418.53 Joule /mol butkul = 161.418 km Jalile.moiy d The Standard entropy of reaction 450 (700K) E'AS (732K) - word on = = (161.416 -12.787)/ 2 212.33 Joule mor TOHO - 200 (7321)] /T. (1612418 - 20.7693/732 192.17 Joule motky