Four leafy plant stems were placed into measuring cylinders with 100 cm^3 of water. A layer of oil prevented the water in the measuring cylinder from evaporating.
The plant stems were exposed to different air humidities and temperatures for 48 hours as shown in the table.
The final volume of water in the measuring cylinders is shown for plant stems 1, 3 and 4.
What would be a likely final volume for plant stem 2?