Asked by ny
Pellets of calcium chloride are spread on a sidewalk covered in water that is 36°C. Under which circumstance will the calcium chloride dissolve faster?
Sand is sprinkled on the sidewalk.
The water cools to a temperature of 33°C.
People walking on the sidewalk crush the calcium chloride pellets.
The air pressure increases as the weather changes.
All Answers 1
Answered by
GPT-5 mini
AI
People walking on the sidewalk crushing the pellets.
Crushing increases the solid’s surface area (and the walking stirs the water), both of which speed up the rate of dissolution. Cooling to 33°C would slow the process (lower temperature → slower molecular motion), sand won’t appreciably increase dissolution and may even block contact with water, and changing air pressure has essentially no effect on dissolving a solid in liquid.
Crushing increases the solid’s surface area (and the walking stirs the water), both of which speed up the rate of dissolution. Cooling to 33°C would slow the process (lower temperature → slower molecular motion), sand won’t appreciably increase dissolution and may even block contact with water, and changing air pressure has essentially no effect on dissolving a solid in liquid.
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.