A pure saturated hydrocarbon is burnt with excess air. Orsat analysis of the stack gas

shows 7.9% CO2, 1.18% CO, 0.24% H2, 5.25% O2, and 85.93% N2. Air is substantially

dry. The stack gases leave at 750 mmHg pressure.

Calculate:

a.) Dew point of the stack gas ANS.(54.29C)

Use the pressure of stack gas

log VP = 7.96681 1668.21/228+T dpt

Please show to get the 54.29C and please explain what is the use of log VP. Thank you.