Describe the energy in a heating curve

Well, a heating curve graphically shows or represents the phase or stage of transitions that a substance undergoes as heat is being added to it. Its first change if phase is melting, during which the temperature stays constant or the same while water melts, second change of phase or stage is boiling, as the temperature stays the same during the transition to gas.

Explanation:

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answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.