The ASHRAE Handbook of Fundamentals (which you can find free on the Web as a pdf) is also an excellent reference. This ebook will be free on Feb. 1 https://www.amazon.com/dp/B084HKJTDZ
Thank you so much sir for your response. my area of research is eco-friendly refrigerants.. so i want to know how to calculate the vapour pressure of a refrigerant analytically before going for software
The relationship between saturation temperature and pressure for any substance is empirical by necessity. There are theoretical relationships between various properties, such as ∂h/∂s)p=T (from Maxwell's relationships) and the Clapeyron equation, dPsat/dTsat=hfg/TsatVfg. The NOVEC family of refrigerants has been identified as "green friendly" so you might want to investigate them. You need to study Thermodynamics. The greatest textbook ever written on the subject is by Gordon van Wylen and Richard Sonntag.