Sorry to bother you again, but there is one thing that doesn't make sense to me with this equation: If you hold pressure constant and increase volume temperature increases. Please explain, because I intuitively think if pressure is held constant the temperature would rise when volume is reduced not increased! Thank You for all you do.
It's not a bother, though I am not sure how I can explain it. The equation represents real life behavior that an ideal gas follows. Also, make sure you understand the difference between specific volume and volume. When you use volume, the mass value is independent, whereas when you use specific volume, you are finding it per unit mass basis.
it's dependent on where the term is used. For example, we use absolute pressure to define pressure that's measured relative to a vacuum. You can read more about this here: www.sciencedirect.com/topics/computer-science/absolute-scale
