Physics

posted by .

To help prevent frost damage, fruit growers sometimes protect their crop by spraying it with water when overnight temperatures are expected to go below the freezing mark. When the water turns to ice during the night, heat is released into the plants, thereby giving them a measure of protection against the falling temperature. Suppose a grower sprays 6.17 kg of water at 0°C onto a fruit tree. (a) How much heat is released by the water when it freezes? (b) How much would the temperature of a 158-kg tree rise if it absorbed the heat released in part (a)? Assume that the specific heat capacity of the tree is 2.5 x 103 J/(kg C°) and that no phase change occurs within the tree itself.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Science

    Why does the temperature remain constant around 0 degrees C and 100 degrees C?
  2. Science

    To protect their crops during freezing temperatures, orage growers spray water onto the trees and allow it to freeze. In terms of energy lost and energy gained, explain why this practice protects the oranges from damage.
  3. science

    which of the following is the best reason salt is sometimes spread on icy highways?
  4. science

    When you freeze water, 80 calories of heat are released into the surroundings for every gram of water that freezes. This is known as the "latent heat of fusion" of water, which is 80 cal/g. Heat of fusion is a characteristic property. …
  5. chemisty

    Farmers often spray water on plants when there is a chance of frost to protect them from freezing. Calculate the amount of heat released when 100 mL of water at 25oC cools to -2oC. (ΔHfusion water is 6.03 kJ/mol, cwater = 4.18 …
  6. chemisty

    Farmers often spray water on plants when there is a chance of frost to protect them from freezing. Calculate the amount of heat released when 100 mL of water at 25oC cools to -2oC. (ΔHfusion water is 6.03 kJ/mol, cwater = 4.18 …
  7. PHYSICS

    The latent heat of fusion of water is 3.34 x 105 J/kg. A farmer places a barrel containing 1000 kg of water in his barn one winter's night. When the water cools to 0oC, it begin to freeze. How much heat does the water give out while …
  8. physics

    What are the temperatures for freezing water and boiling water on the Kelvin temperature scale?
  9. Introduction to physical science

    I am not understanding this because I thought ice ruins the fruit. Could you please help. Why does spraying fruit trees with water before a frost help protect the fruit from freezing?
  10. Chemistry

    Calculate the heat released when 42.0 g of water at 35.0 degrees Celsius is converted to ice at -5.0 degrees Celsius. The specific heat of ice is 2.03 J/(g C), the molar heat of fusion of ice is 6010 J/mol, and the specific heat of …

More Similar Questions