Select all that apply. When the products of a reaction are cooler than the reactants: The reaction is exothermic. The reaction is endothermic. The reactants lost energy. The change in enthalpy is positive.

jjj Explanation:

> 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.