Properties of Pure Substances

S.GunabalanAssociate ProfessorMechanical Engineering DepartmentBharathiyar College of Engineering & TechnologyKaraikal - 609 609.e-Mail : gunabalans@yahoo.com

Part - 2

Properties of Pure Substances

• Pure SubstanceA pure substance has a homogeneous and

invariable chemical composition and may exist in more than one phase.

Examples: 1. Water (solid, liquid, and vapor phases) 2. Mixture of liquid water and water vapor 3. Carbon dioxide, CO24. Nitrogen, N2

Properties of Pure Substances

Properties of Pure Substances

Properties of Pure Substances

At temperatures and pressures above the critical point, the phase transition from liquid to vapor is no longer discrete.

Properties of Pure Substances

Properties of Pure Substances

Properties of Pure Substances

Phase diagram of pure substances

Reference• Rajput, R. K. 2010. Engineering thermodynamics. Jones and Bartlett

Publishers, Sudbury, Mass.• Nag, P. K. 2002. Basic and applied thermodynamics. Tata McGraw-Hill,

New Delhi.• http://www.wiley.com/college/moran/CL_0471465704_S/user/tutorials/

tutorial2/state_princ/pv_dome.jpg