Which property of state is not an extensive property?
a. Temperature
b. Volume
c. Number of molecules
d. Mass
Extensive properties depend on the amount of matter in a sample. In contrast, Intensive properties are properties that only depend on the type of matter in a sample and not the amount of matter. Intensive properties include temperature, density, solubility, and color of the matter. As previously mentioned, extensive properties are properties of the amount of matter in a sample, including the number of molecules. The number of molecules depends on the sample's size; and larger samples will have greater mass, and smaller samples will have a smaller mass. Samples will consume a larger volume as the size is increased. Therefore extensive properties of matter are the number of molecules, mass, and volume.
After all this, we can rule out A) Temperature as it is an intensive property of matter.
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
The dew point (°C) of moist air at 30°C and 30% relative humidity is most nearly: