 Quote by sparc
Thank you for your assistance, that's what i was looking for, though the ratio is lower than i found elsewhere for 14.7 psia. any idea why there is such a wide range of 'correct' answers to this condition? It seems that it would be straight forward and the answer should be consistent for the same conditions.
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I really don't know unless those values do not account for the thermal expansion of the liquid water.
For example, water at 80°F has a specific volume of 0.016073 ft
3/lbm so the
liquid water at 212°F with a specific volume of .016716
3/lbm has volume of 1.04 times that of
water at 80°F, and the
steam at 212°F has then 1667 times the volume of
liquid water at 80°F.
The steam to water volume ratio depends on which reference temperature one selects for the water and the ambient pressure.