A 100-g cube of ice is heated from -120C to +120C. In which of the following processes is the greatest amount of energy absorbed by this material?
a. warming ice to the melting point
b. melting the ice to become water
c. warming the resulting water
d. vaporizing the water to become steam
e. heating the steam
Question 2
Water at room temperature, 20C, is pumped into a reactor core where it is converted to steam at 200C. How much heat (in J) is transferred to each kilogram of water in this process? (csteam = 2 010 J/kgC; Lsteam = 2.26 103 J/g; 1 cal = 4.186 J.)
a. 3.35 105
b. 7.53 105
c. 2.67 106
d. 2.80 106
e. 3.01 106
Energy coupling in mechanical and chemical processes
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