The isochoric heat capacity of normal butanol was measured in critical and
vapor regions in the temperature and specific volume ranges 541.40-639.12 K
and 2.127 x 10(-3)-16.15 x 10(-3) m(3)/kg, respectively. A C-V=f(T, rho) e
quation describing heat capacities in the liquid and vapor phases including
the vicinity of the critical point was obtained.