Question

define please
Exothermic reaction
Combination reaction
Balanced equation

Answer 1

1.exothermic rxn is heat evolved reaction
2.when 2 reactant or more combine to form single product
3. when the numbers of mole of each side of chemical rxn is satisfied

Answer 2

1.it is a reaction in which energy is released in the form of heat.
2.it is a reaction in which two or more substances
combine to form a single compound.
3.it is equation in which number of different atom of different elements is equal on the side of equation.