Question

8. The thermal Decomposition of acetaldehyde vapor: CHỊCHO - CH + CO Is an irreversible process whose rate at 518 °C is given by the following two sets of data for pressure changes at constant temperature and volume Initial Pressure of Acetaldehyde (mm Hg) 400.0 300.0 Total Pressure of the system after 100 sec (mm Hg) 500.0 360.0 Find the order of the decomposition process with respect to acetaldehyde. A) 0 B) 2

Answer is 2, but how?

Answer 1

- CH cho k (hy + co Rate of Piano - 0 dt at to Po at too Po at to los por x o x o x at to loos porx P Poma+22 - 0 Pen Po +*+22 - porx hate : k P(ChcHom) ord of the reaction Data: C Initial pressure of CH₂ CHO(po) Pressure of Cu, cuo ofter 100s Total pressure , dp Too 360 I oft (monthly aftur loos (fe) 500 110% 01 ) 100 Rate, Rate 2 You 400 300 Rate. 7100 160.06 100 Usling-, pe = porx x= Pt - Po Istute - xx (500-400)mmHg x= 100mm Hg fo-x2 400-100 - 300 mm Hg 2nd Data ² pt Po tx X² Pr - po xe (360- 300)mming x. 6ommity (Playecc)po- *• 300-602 240 mm by

Using eq. Kate, • kr (peug cuo)" Rate (Pertz (10) m oto (30) wlor a la log (56) m log (5) me 0-22 0-0969 m.2.27 = 2