If mw is the mass of water changing the enthalpy from h1 and h2 in a boiler and L is the latent heat of steam at 100°C, then the equivalent evaporation is defined as:

If mw is the mass of water changing the enthalpy from h1 and h2 in a b

1.	If mw is the mass of water changing the enthalpy from h1 and h2 in a boiler and L is the latent heat of steam at 100°C, then the equivalent evaporation is defined as:
A.	[mw (h2 – h1)]/L
B.	[mw (h2 + h1)]/L
C.	[mw (h2 + L)]/h1
D.	(mwh1h2)/L
Answer» B. [mw (h2 + h1)]/L