Steam at 134 kPa and 85% quality enters a radiator. The steam is condensed as it flows through the radiator and leaves as condensate at 90°C. If we solve for h (or hf for this problem), h is the condensate (saturated liquid). Then solve for m in the Q equation. The columns in the table clearly show hf and hg and hfg for the two set points (90°C and 134 kPa).