A student sprayed a small amount of water into the terrarium, placed a thermometer inside, and then sealed the terrarium with a lid. Next, the terrarium was placed on a table where it was exposed to sunlight.
The student checked the terrarrium a few times each day for one month. During that time the plants produced new stems and leaves.
The student noticed that water droplets formed on the inside of the glass jar. The number of droplets was greatest on sunny days and was usually greater in the morning than in the evening. The student also observed that the temperature inside the terrarium was highest during the day when the sun was shining.
The water in the spray bottle has a temperature of 25oC. The thermometer in the terrarium reads 30oC, and a thermometer in the room where the terrarium is located reads 25oC. The temperature outdoors is 40oC. What is the temperature of the water vapor inside the terrarium?
A.
40
B.
35
C.
30
D.
25