Energy Transfer

Heat and work are energy transfer mechanismsbetween a system and its surroundings, there aremany similarities between them:• Both are recognized at the boundaries of a system asthey cross them. Both heat and work are boundaryphenomena.• Systems possess energy, but not heat and work.• Both are associated with a process, not a state.Unlike thermodynamic properties, heat or work hasno meaning at a state.• Both are path functions (i.e. their magnitudes dependon the path followed during a process as well as theend states).These are basic concepts useful in further deliberations.Be clear about their precise meaning.Energy Transfer 5© Copyright 2005 Prof. Arun S. Mujumdar.