2) (5 pts each section)

a) What is the enthalpy change needed to change 3 kg of liquid water at 0°C to steam at

0.1 MPa and 150°C?

b) What is the enthalpy change needed to change 1 kg of a water-steam mixture of 60%

quality to one of 80% quality if the mixture is at 150°C?

c) Calculate the AH value for an isobaric change of steam from 0.8 MPa and 250°C to

saturated liquid?

d) In what state is water at 0.2 MPa and 120.21°C? At 0.5 MPa and 151.83°C? At 0.5

MPa and 153°C?

e) What is the volume change when 2 kg of H₂0 at 6.8 MPa and 93°C expands to 1.6 bar

and 250°C?