Answer

Assume that a cooling system in a car holds 16 L of water. How much heat is absorbed by the water if the heat of the water rises from 20 degrees C to 90 degrees C?

Note that a liter of water has a mass of 1 kg.

 

The heat absorbed can be calculated from Eq. 14-2. 

From the table, the specific heat (c) of liquid water is 4186 J/kg C

The delta T is 90 - 20 = 70 degrees C

Q = mcDT = (16 L)( 1 kg/L)(4186 J/kg C)(70 C) = 4.7x10⁶ J