Btu/lbm to change water to vapor

[dpolet]

NCEES 2008 AM #138 use 970btu/lbm. However, I found at 14.7psia, the water Hfg=1060 btu/lbm. They have different btu/lbm, did I miss anything? Thanks.

 

[CRNewsom]

My tables list hfg of water at 14.696 psia at 970.4 Btu/lb.

The only values I see where hfg approaches 1060 Btu/lb is at 0 psia. Perhaps your reference tables have psia and psig confused?

 

[dpolet]

CRNewsom,you are correct. I mixed psia and psig. Thank you.