If a chemical reaction occurs in a flask, and the flask becomes colder, the reaction was exothermic. true or false

false

Explanation:

hope this helps you

False, if the flask becomes colder it's endothermic. I hope this helps! :)

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.