Steam at 2.0 kPa has Tsat = 17.5 C. At 40 C, the steam will be:
A. superheated
B. subcooled
C. saturated
D. supersaturated
A. super heated, since the 315K (40C) and .02 bar (2kpa)lines intersect on the right side or Super heated vapor side of the water t-v diagram at approximately 1.5 entropy
Which thermodynamic property is the best measure of the molecular activity of a substance?
A. Enthalpy
B. Internal energy
C. Entropy
D. External energy
Which property of state is not an extensive property?
a. Temperature
b. Volume
c. Number of molecules
d. Mass
The dew point (°C) of moist air at 30°C and 30% relative humidity is most nearly: