関連ワード:  prove work is path function    show that work is path function and not a property    show that work is a path function    show that work is a path function and not the property of system    prove that work is a path function thermodynamics    prove that work is a path function mathematically    prove that work done is a path function    prove that work transfer is a path function    mathematically prove that work is a path dependent function    is work a path function or state function