Question

An automobile traveling 50 Km per hour emits 0.1% CO from the exhaust. If the exhaust...

An automobile traveling 50 Km per hour emits 0.1% CO from the exhaust. If the exhaust rate is 80 m3 per minute, what is the CO emission in grams per kilometer? Assume 25 degrees Celsius and 1 atmosphere of Pressure.

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Answer #1

flow rate of exhaust= 80 m3/min = 80*1000L/miin= 80*1000*60 L/hr =48*105 L/hr

moles of exhaust can be calculated from gas lawm n= PV/RT, P= 1atm,V= 48*105 L/hr, R=0.0821 L.atm/mole.K

T= 25deg.c =25+273= 298K, n= 1*48*105/ (0.0821*298)= 196192 moles/hr

emissions of CO =0.1%, emission per hour= 196192*0.1/100 = 196.192 moles/hr

mass of CO emitted =moles of CO per hr* molar mass= 196.192*28=5493 g/hr

this is the CO generated when travelling at 50 km/hr

hence CO generated/ kolometer= 5493g/hr/50 km/hr= 110 gm/kilometer

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