The mass of water that would be evaporated in one hour, from feedwater at 100°C into dry saturated steam at 100°C, by the same amount of heat that is required, per hour, to produce steam at the actual boiler condition is called the:
A. Heat rate
B. Factor of evaporation
C. Equivalent evaporation
D. Total enthalpy
E. Latent heat of the transformation
Answer: C