Definition. The partial pressure of a given gas is defined as the pressure exerted by that gas alone. For example, consider the gaseous mixture of oxygen, nitrogen, carbon dioxide, and water vapor, the typical mixture found in alveolar gas.
From Wikipedia, the free encyclopedia. Philadelphia County is a county located in the commonwealth of Pennsylvania. At the 2010 census, the population was 1,526,006, making it the most populous county in the state, despite being the second smallest county in the state by land area.
For the latest traffic information for Pennsylvania and New Jersey, please dial 511 or visit 511pa.com or 511nj.org. 1  Ballpark Information STREET ADDRESS The Phillies. Citizens Bank Park. 2  Directions Northeast Philadelphia, Bucks County, New York and points North.