The Exame Nacional do Ensino Médio (Enem) was created in 1998 and has undergone two changes since then. It demands from the candidates the articulation of the knowledge learned in high school, relating them with illustrations, to find a resolution to the problems. Among them, the production and use of biodiesel is one of the subjects charged in the matrix of the exam. Therefore, the research sought to understand the profile of the questions about this biofuel, considering its approach, the national context and the presentation of the information about it in the evaluation. From a universe of 1.503 questions (1998 and 2017), nine were selected. Between the editions of 1998 and 2002 there was no direct mention of the biofuel chosen. From 2003 onwards, the exam addresses from the transformation of vegetable oil into biodiesel, through the transesterification reaction, to its use and production policies.
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