Question

Specific internal energy of a pure substance is a function of

Answer 1

n thermodynamics, a state function, function of state, state quantity, or state variable is a property of a system that depends only on the current state of the system, not on the way in which the system acquired that state (independent of path)

 

Internal energy of any system is the total of all the kind of energy present in the system. It does not depend on the path but only on the state of the system and hence it is a state unction.