What information does a phase diagram give? A. The effect of temperature on volume changes of substances B. The effect of temperature and pressure on the phase of a substance C. The effect of concentration on the freezing point of a solution D. The effect of oxidation number on the melting point of a metal

B. The effects of temperature and pressure on the phase of a substance

Explanation:

Ape**x

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

2b2t

explanation:

2b2t