Using the method of semantic differential the universities of EMERCOM of Russia students’ attitude toward subject «Chemistry» was studied. The time history of this attitude during the learning process was revealed. It is shown that depending on the chosen specialty the military students have the different attitude toward the subject, largely due to the misunderstanding of the role of Chemistry in the study of the professional disciplines. It is noted that the progress of academic performance is impossible without a pedagogical diagnosis and monitoring of the emotional state of students.