Select all that apply.
when the products of a reaction are hotter than the reactants

a.) the reaction is exothermic.
b.) the reaction is endothermic.
c.) the reactants lost internal energy.
d.) the change in enthalpy is positive.

Option (A) and (C) are correct answers.

Explanation:

When reactants combine and release energy in the form of heat then this type of reaction is known as exothermic reaction.

Internal energy is the energy within an object or molecule due to motio of its atoms.

During exothermic reaction, products become hotter and also there is loss of internal energy of reactants as heat is released.

> 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.