関連ワード:  work state or path function    work done state or path function    work is state function or path function in physics    work and heat are state or path function    work done is state function or path function in physics    adiabatic work is state function or path function    irreversible expansion work is state function or path function    reversible expansion work is state function or path function    work done and heat are state function or path function    work done in adiabatic process is state function or path function