5.Hydrochloric acid and sodium hydroxide react to produce water and sodium chloride in an endothermic reaction. Which statement must be true of the reaction?(1 point)
More bond energy is absorbed on the reactants side than is released on the products side.
The total bond energy of water and sodium chloride is greater than the total bond energy of hydrochloric acid and sodium hydroxide. ****
The bond energy used to break the bonds in hydrochloric acid and sodium hydroxide is less than the energy released to form the bonds in water and sodium chloride.
The energy of each bond in water and sodium chloride is greater than the energy of each bond in hydrochloric acid and sodium hydroxide.
6. Imagine a graph. The x-axis is labeled "Time" and is measured in seconds, and the y-axis is labeled "Potential Energy" and is measured in kilojoules. The slope starts at 0 seconds with a plateau at 25 kJ. This plateau is labeled "Reactants." The slope then rises to a peak labeled "Activation Energy" at 78 kJ. Finally the slope drops to a plateau at 14 kJ and is labeled "Products."
What does the graph described above represent?
an endothermic reaction
rate of Reaction graph
an exothermic reaction ****
a phase change graph
This may surprise you but the reaction between HCl and NaOH is an EXOTHERMIC reaction, contrary to what the problem states. Your answer is correct for an exothermic reaction but not for an endothermic reaction. To answer the question, even though it is stated incorrectly, the correct answer would be the other choice for an endothermic reaction.
Your anwer for the graph question is correct.
To determine the answer to question 5, you need to understand that an endothermic reaction absorbs more energy than it releases. In the given scenario, hydrochloric acid and sodium hydroxide react to produce water and sodium chloride in an endothermic reaction. This means that more bond energy is absorbed on the reactants' side than is released on the products' side. Therefore, the correct statement is that the total bond energy of water and sodium chloride is greater than the total bond energy of hydrochloric acid and sodium hydroxide.
To solve question 6, you need to interpret the graph described. On the graph, the x-axis represents time in seconds, and the y-axis represents potential energy in kilojoules. The graph starts at 0 seconds with a plateau at 25 kJ, labeled "Reactants." Then, the slope rises to a peak labeled "Activation Energy" at 78 kJ. Finally, the slope drops to a plateau at 14 kJ, labeled "Products." This graph represents an exothermic reaction because the potential energy decreases from the reactants to the products. Exothermic reactions release energy, which is evident from the drop in potential energy. Therefore, the correct answer is that the graph described represents an exothermic reaction.
The correct answer is:
an exothermic reaction