Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_31856 ( "2nd component" text, "b.p. 2nd comp. (\u02daC)" real, "3rd component" text, "b.p. 3rd comp. (\u02daC)" real, "b.p. azeo. (\u02daC)" real )

### Question ###
Tell me the sum of bp 2nd comp with bp azeo of 57.5

### Accurate SQL ###

SELECT SUM("b.p. 2nd comp. (\u02daC)") FROM table_31856 WHERE "b.p. azeo. (\u02daC)" = '57.5'