The triple point of a substance is: A) That point when the ...

[lindiwe]

The triple point of a substance is:
 
  A) That point when the substance changes its specific gravity at the same pressure, temperature, and volume.
  B) The point when the density of a substance changes to a solid, liquid, or vapor at standard conditions.
  C) The point at which the substance changes state at the same pressure, temperature, and volume.
  D) The point where a substance can exist as a solid, liquid, or vapor at the same time at one specific pressure and temperature.

Question 2

The AHRI definition of standard air is:
 
  A) 400 CFM per ton.
  B) Air at a temperature of 0C with a relative humidity of 50.
  C) Air weighing 0.075 lb/ft3 at 70F with a barometric pressure of 29.92 in Hg.
  D) 78 nitrogen, 21 oxygen, and 1 other gases.

[joanwhite]

Answer to Question 1

D

Answer to Question 2

C

[lindiwe]

Excellent

[gcook]

TYSM