Use of the steam tables and answer the following questions:
a) What is the enthalpy change needed to heat 3 lb of water from 60 psia and 32°F to steam at 1atm and 300 °F?
b) What is the enthalpy change needed to heat 1 lb of water at 60 psia and 40 oF to steam at 300 °F and 60 psia?
c) What is the enthalpy change needed to change 1 lb of a water-steam mixture of 60% quality to one of 80% quality if the mixture is at 300 oF?
d) Calculate the ?H value for an isobaric (constant pressure) change of steam from 120 psia and 500 oF to saturated liquid.
e) Does an enthalpy change from saturated vapor at 450 °F to 210 °F and 7 psia represent an enthalpy increase or decrease? A volume increase or decrease?
f) In what state is water at 40 psia and 267.24 °F? At 70 psia and 304 oF? At 70 psia and 304 oF?
g) A 2.5-ft3 tank of water at 160 psia and 363.5 oF has how many cubic feet of liquid water in it? Assume that you start with 1lb of H20. Could it contain 5 lb of H2O under these conditions?
h) What is the volume change when 2 lb of H20 at 1000 psia and 20 oF expands to 245 psia and 460 oF?
i) Ten pounds of wet steam at 100 psia has an enthalpy of 9000 Btu. Find the quality of the wet steam.