Question

PROBLEMS 1. Compare the root mean square velocity ofa Kr atom at 25 °C with the speed of a jet airliner. Esti- mate the speed of ajet airliner based on your knowledge and experience.

Answer 1

T3RT us Kalmal salarman MKB 85. 8 46 kg/mol. Rz 8.314 T= 25² +273 = 298k Vorms= 3x8.3148298 83. 8810-3 V Voms 297.82 m/s We assume vjet = 245. m/s. - Voms = 297.82 adiet 245 Vams - 1.22 Vjet appuy same you can pay that ons vjet Pressure at 3 TP = 1 atm according dalton's love of factial pressus Pro = PxXN2 PH2 = 0.641 Pag 0.6 atm IN

au) given, P = 755. 3 town Pho = 23.8 torr so. Po = P - Proo (for Daltons lam, PO₂ = 75503- 23.8 PO2 = 731.5 tour T= 25 298K Solution VEL Step I. flond moles of O2 PV = nRT n = 1 X 731.5 760 0.0821 X 298 = 0.0394 mal Step II find mass of Keloz. 2 KCl 03 (5) ► 2kcd(s) + 30268) applied POAC Rule. moles of O2 = moles of Koloz cofficient cofficient mass of KClO3 - 0.884 molare mass X2 3 mass of KClO3 = 0.0394 X2 X 122.55 3 mada ok kalb; = 5:22 /homk уви