36 - T # 8 - What is Specific Humidity ? - Posted by Kambiz Ehsani - 6/16/2018

The amount of moisture present in the air is expressed in grains of moisture per pound of dry air and referred to as specific humidity. In a pound of water there are 7,000 grains of moisture. Pounds of moisture per pound of dry air could be used to indicate how much moisture is present, but generally , grains of moisture are used because the numbers are larger and easier to work with.