Question

Help!!!

How can you tell if a chemical reaction is occurring in the given examples: when a log burns in a fireplace and when vinegar and baking soda are mixed? Explain your reasoning.

Answer 1

1. When a log burns in a fireplace:

- One way to tell if a chemical reaction is occurring when a log burns in a fireplace is by observing the presence of heat and light. During the burning process, the log undergoes a combustion reaction with the oxygen in the air. This reaction releases energy in the form of heat and light, which is why we see flames and feel the warmth.

2. When vinegar and baking soda are mixed:

- In this case, you can identify a chemical reaction by observing the formation of bubbles or a fizzing sound. When vinegar (which contains acetic acid) is mixed with baking soda (which contains sodium bicarbonate), a chemical reaction occurs. The reaction produces carbon dioxide gas, which causes the bubbles and fizzing. This is a good indicator that a chemical reaction is taking place.

In both examples, the presence of observable changes such as heat, light, bubbles, or fizzing can indicate that a chemical reaction is occurring. It's important to note that chemical reactions involve the breaking and forming of chemical bonds, resulting in the transformation of substances into new substances with different properties.

I hope this helps! Let me know if you have any further questions.

Step-by-step explanation:

Answer 2

a burning log is a oxidation-reduction reaction, and baking soda mixed with vinegar is an acid/base reaction

Explanation:

When a log burns, it is the result of a combustion reaction, where O2 in the air reacts with the organic elements in wood, producing a lot of energy as the reaction occurs, which creates fire.

When the acid, vinegar, hands over its Hydrogen atom to the base, baking soda, it causes the fizzing to occur.