If a leaf is to maintain a temperature of 40.0°C (reasonable for a leaf), it must lose 250 W/m2 by transpiration (evaporative heat loss). Note that the leaf also loses heat by radiation, but we will ignore this. How much water is lost after 1.00 h through transpiration only? The area of the leaf is 0.00300 m2. Heat of vaporization for water is 2256 kJ/kg (see Table B.5).

If a leaf is to maintain a temperature of 40.0°C (reasonable for a leaf), it must lose 250 W/m2 by transpiration (evaporative heat loss). Note that the leaf also loses heat by radiation, but we will ignore this. How much water is lost after 1.00 h through transpiration only? The area of the leaf is 0.00300 m2. Heat of vaporization for water is 2256 kJ/kg (see Table B.5).

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter14: Heat And Heat Transfer Methods

Section: Chapter Questions

Problem 52PE: During heavy exercise, the body pumps 2.00 L of blood per minute to the surface, where it is cooled...

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