\usepackage[latin1]{inputenc}
%\usepackage[T1]{fontenc}
\usepackage[spanish]{babel}

\addto\captionsspanish{%
  \def\listtablename{\'Indice de tablas}%
  \def\tablename{Tabla}%
}

\hyphenation{a-que-llas}

\hyphenation{ca-pi-ta-les}
\hyphenation{con-si-de-ra-do}
\hyphenation{cons-tan-te}

\hyphenation{res-pec-to}

\hyphenation{tem-pe-ra-tu-ras}

\hyphenation{va-lo-res}