Question
Carla and her lab group are performing an experiment in science class. They are trying to make a cloud in a jar, as shown below, using ice, water, and aerosol spray.
Image courtesy of NOAA
To make the cloud pictured above, Carla's lab group first poured water into the jar. Then they sprayed a small amount of aerosol spray into the jar for the water vapor to condense upon. Next they quickly covered the jar with a bowl of ice. A black sheet of paper was placed behind the jar so the cloud could be seen more easily. The data table below shows the values for each of the experimental variables used during the group's first attempt at making a cloud.
Cloud Formation: Trial 1
Water Ice
Volume Temperature Mass Temperature
60 mL 70°C 10 g 0°C
How should the group alter the water in the experiment in order to create the largest possible cloud in trial 2?
A.
by using 120 mL of water at 50°C
B.
by using 120 mL of water at 90°C
C.
by using 40 mL of water at 90°C
D.
by using 40 mL of water at 50°C
Image courtesy of NOAA
To make the cloud pictured above, Carla's lab group first poured water into the jar. Then they sprayed a small amount of aerosol spray into the jar for the water vapor to condense upon. Next they quickly covered the jar with a bowl of ice. A black sheet of paper was placed behind the jar so the cloud could be seen more easily. The data table below shows the values for each of the experimental variables used during the group's first attempt at making a cloud.
Cloud Formation: Trial 1
Water Ice
Volume Temperature Mass Temperature
60 mL 70°C 10 g 0°C
How should the group alter the water in the experiment in order to create the largest possible cloud in trial 2?
A.
by using 120 mL of water at 50°C
B.
by using 120 mL of water at 90°C
C.
by using 40 mL of water at 90°C
D.
by using 40 mL of water at 50°C
Answers
Answered by
GPT-4o mini
To create the largest possible cloud in trial 2, the group should focus on both the volume of water and the temperature at which it is used.
1. **Volume of Water**: A larger volume of water can produce more water vapor, which can condense to form a cloud. Therefore, increasing the volume from 60 mL to 120 mL would be beneficial.
2. **Temperature of Water**: A higher temperature of water increases the amount of water vapor it can hold, as warmer water can evaporate more readily. Thus, opting for a higher temperature (closer to boiling) would be advantageous for producing more vapor.
Given these considerations:
- Option A suggests using 120 mL of water at 50°C, which does increase the volume but at a lower temperature.
- Option B suggests using 120 mL of water at 90°C, which increases both the volume and uses a relatively high temperature to facilitate more evaporation.
- Option C suggests using a small amount (40 mL) of water at a high temperature (90°C), which could create vapor but the volume is limited.
- Option D suggests using 40 mL of water at a lower temperature (50°C), which would not be effective as it has both lower volume and a lower temperature.
The best choice that increases both the volume and the temperature of the water, thus maximizing cloud formation, is:
**B. by using 120 mL of water at 90°C.**
1. **Volume of Water**: A larger volume of water can produce more water vapor, which can condense to form a cloud. Therefore, increasing the volume from 60 mL to 120 mL would be beneficial.
2. **Temperature of Water**: A higher temperature of water increases the amount of water vapor it can hold, as warmer water can evaporate more readily. Thus, opting for a higher temperature (closer to boiling) would be advantageous for producing more vapor.
Given these considerations:
- Option A suggests using 120 mL of water at 50°C, which does increase the volume but at a lower temperature.
- Option B suggests using 120 mL of water at 90°C, which increases both the volume and uses a relatively high temperature to facilitate more evaporation.
- Option C suggests using a small amount (40 mL) of water at a high temperature (90°C), which could create vapor but the volume is limited.
- Option D suggests using 40 mL of water at a lower temperature (50°C), which would not be effective as it has both lower volume and a lower temperature.
The best choice that increases both the volume and the temperature of the water, thus maximizing cloud formation, is:
**B. by using 120 mL of water at 90°C.**
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