Question

7. Which is the best description of when water boils?a. It is when the vapor pressure of water equals the surrounding atmospheric pressure.b. It is when the first bubble appears in a sample that is being heated.c. It is when bubbles are continually forming in a sample that is being heated.d. It is when the temperature of the water reaches 100 °C.

Answer 1

The alternative b is not a good description because you can form bubles without the water being boiling yet.

Also, alternative c is also not a good option because it is just a description of what is being seen, it could be replicated in other ways.

Alternative d only gives a termperature, and the boiling temperature can change depending on other conditions.

The alternative the best describes is alternative A.