Compare endothermic and exothermic reactions in terms of potential energy, heat flow, and observed temperature changes. Explain your answer in complete sentences.
I just wanted to compare my answer with the answer that i will be getting.. This is what I have:
Exothermic reaction starts at a higher energy value and ends at a lower energy value. In an exothermic reaction, we know that energy is given off in the form of heat. This energy comes from the stored energy of the unbroken bonds between atoms, which is the potential energy of the molecules. When these bonds break, energy is released in the form of heat. Therefore we would expect the potential energy of reactants to be larger than the products.
can you add to this?
I might add that the excess heat (but light also may be involved) is absorbed by the surroundings in exothermic reactions.
Next, you need to talk about endothermic reactions and how the heat needed to make the reaction go is supplied by the surroundings.
Endothermic reactions and exothermic reactions differ in terms of potential energy, heat flow, and observed temperature changes.
Potential Energy:
In an endothermic reaction, the products have higher potential energy than the reactants. This means that energy is absorbed from the surroundings to drive the reaction forward. In contrast, exothermic reactions have lower potential energy in the products compared to the reactants. It means that energy is released to the surroundings during the reaction.
Heat Flow:
Endothermic reactions specifically require or absorb heat energy from the surroundings to proceed. Heat flows into the reaction system from the surroundings, resulting in a decrease in the temperature of the surroundings. In exothermic reactions, heat energy is released or given off to the surroundings, causing an increase in the temperature of the surroundings.
Observed Temperature Changes:
Endothermic reactions often feel cold to the touch since they draw in heat from their surroundings, resulting in a decrease in the temperature of the reaction mixture and its immediate surroundings. On the other hand, exothermic reactions feel warm or hot to the touch because they transfer heat to their surroundings, leading to an increase in temperature.
To summarize, endothermic reactions absorb energy from the surroundings, have higher potential energy in the products, cause a decrease in temperature, and feel cold. Exothermic reactions release energy to the surroundings, have lower potential energy in the products, cause an increase in temperature, and feel warm or hot.