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"Conversar" is an intransitive verb which is often translated as "to talk", and "estudiar" is a transitive verb which is often translated as "to study". Learn more about the difference between "conversar" and "estudiar" below.
conversar(
kohn
-
behr
-
sahr
)An intransitive verb is one that does not require a direct object (e.g., The man sneezed.).
a. to talk 
Jorge y su esposa conversaron acerca de sus planes para el retiro.Jorge and his wife talked about their retirement plans.
b. to converse 
La gente conversaba animadamente mientras disfrutaba de su comida.People were conversing animatedly and enjoying their meals.
c. to chat 
Las abuelas conversaron por horas acerca de sus nietos.The grandmothers chatted for hours about their grandchildren.
estudiar(
ehs
-
too
-
dyahr
)A transitive verb is a verb that requires a direct object (e.g., I bought a book.).
a. to study 
Estudié la lección de química con detenimiento.I studied the chemistry lesson carefully.
a. to study 
Si quieres ser cirujano, tendrás que estudiar medicina.If you want to be a surgeon, you'll have to study medicine.
a. to study 
Ella le estudió la cara para averiguar si estaba diciendo la verdad.She studied his face to figure out if he was telling the truth.
b. to examine 
Este artículo estudia los pros y los contras de enseñar con portátiles.This article examines the pros and cons of teaching with laptops.
An intransitive verb is one that does not require a direct object (e.g., The man sneezed.).
a. to study 
Mañana no puedo ir a la playa con vosotros porque tengo que estudiar.I can't go to the beach tomorrow with you because I have to study.