Assuming air is an ideal gas with a molecular weight of 28.97, what is the density of air at 1 atm and 600 C?
a. 0.12 kg/m^3
b. 0.40 kg/m^3
c. 0.59 kg/m^3
d. 0.68 kg/m^3
Which thermodynamic property is the best measure of the molecular activity of a substance?
A. Enthalpy
B. Internal energy
C. Entropy
D. External energy
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
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: