The phase of matter of a substance is determined by: a. chemical bonds.
b. the strong force.
c. intermolecular forces
d. nuclear interaction.

Yes, endothermic means it turns cold. and some chemical changes include change of tempature.

Your question is not clear but if you can explain yourself i would be glad to .  just trying to : ))

Go ask spider man

In reversible reaction chemistry equilibrium is attained when the forward and reverse reactions are taking place at the same rate, thus, the concentrations of reactants and products remain the same. a reversible reaction is a chemical reaction where the reactants form products that, in turn, react together to give the reactants back. in irreversible reactions on the other hand, the reactants react to form the products, which cannot revert back into reactants.