Liquid heat capacities of n-octadecane, n-nonadecane, n-docosane, n-octacosane, n-triacontane, n-hexatriacontane and n-pentacontane in the temperature range 373-473 K and of squalane and 2, 6, 10, 14-tetramethylpentadecane, in the temperature range 303-403 K have been measured by DSC. Experimental results were used to verify the applicability of the Benson group contribution method to heavy n- and iso-alkanes.