A student performs an experiment by adding different amounts of vinegar to a mixture of water, dish soap, and baking soda. Why does adding more vinegar result in a greater temperature change in the water
A- As more vinegar is added, there is a greater reaction between the vinegar and the baking soda, and more thermal energy is released.
B- As more vinegar is added, there is a greater reaction between the vinegar and the baking soda, and more thermal energy is absorbed.
C- As more vinegar is added, there is a greater reaction between the vinegar and the dish soap, and more thermal energy is released.
D- As more vinegar is added, there is a greater reaction between the vinegar and the dish soap, and more thermal energy is absorbed.
Help please anyone
It’s actually B according to the options provided above.
The correct answer is A- As more vinegar is added, there is a greater reaction between the vinegar and the baking soda, and more thermal energy is released.
When vinegar (which contains acetic acid) reacts with baking soda (which contains sodium bicarbonate), it undergoes a chemical reaction called an acid-base reaction. This reaction produces carbon dioxide gas, water, and a salt. The reaction between vinegar and baking soda is exothermic, meaning it releases heat.
By adding more vinegar, more acetic acid is available to react with the baking soda, leading to a greater amount of the reaction occurring. As a result, more thermal energy (heat) is released into the mixture, causing a greater temperature change in the water.
To determine the correct answer, let's break down the given options and reason through each one:
A- As more vinegar is added, there is a greater reaction between the vinegar and the baking soda, and more thermal energy is released.
This option suggests that the addition of vinegar leads to a reaction with baking soda, resulting in the release of thermal energy. The reaction between vinegar (an acid) and baking soda (a base) is known as an acid-base reaction, which is exothermic, meaning it releases thermal energy. Therefore, this option seems plausible.
B- As more vinegar is added, there is a greater reaction between the vinegar and the baking soda, and more thermal energy is absorbed.
This option suggests that adding vinegar results in a reaction with baking soda that absorbs thermal energy. However, this contradicts the fact that acid-base reactions are exothermic, and thermal energy is typically released, not absorbed. Hence, this option is unlikely.
C- As more vinegar is added, there is a greater reaction between the vinegar and the dish soap, and more thermal energy is released.
This option proposes that the reaction between vinegar and dish soap leads to the release of thermal energy. However, vinegar (acetic acid) and dish soap typically do not undergo a chemical reaction. Therefore, this option is less plausible.
D- As more vinegar is added, there is a greater reaction between the vinegar and the dish soap, and more thermal energy is absorbed.
Similar to option B, this option suggests that vinegar reacts with dish soap and absorbs thermal energy. However, as mentioned earlier, vinegar and dish soap do not usually undergo a chemical reaction. Therefore, this option is unlikely.
Based on the above analysis, option A seems to be the most accurate explanation. As more vinegar is added, there is a greater reaction between the vinegar and the baking soda, which results in more thermal energy being released. This increased release of thermal energy causes a greater temperature change in the water.
A is correct
when you add an acid to a base, heat is generated and released by the reaction.