PHYSICAL CHEMISTRY IN BRIEF

CHAP. 3: FUNDAMENTALS OF THERMODYNAMICS [CONTENTS] 82

It is often necessary to integrate dzwith one fixed independent variable. For the integration
fromx 1 tox 2 at constantyit applies that

z(x 2 , y) =z(x 1 , y) +

∫x 2

x 1

(

∂z

∂x

)

y

dx , [y]. (3.32)