Air in an internal combustion engine has 227C 1000 kPa with

Air in an internal combustion engine has 227C, 1000 kPa with a volume of 0.1 m3. Now combustion heats it to 1800 K in a constant volume process. What is the mass of air and how high does the pressure become?

Solution

we know PV=MRT

M=PV/RT

R=0.287kj/kgk

T=227+273=500K

P=1000kpa

V=0.1 m3

M=100/143.5=0.6968KG

Now

V=constant

T2/T1=P2/P1

P2=1800*1000/500=3600KPA