14.3.1. Defining Influx and Outflux

Try these first

1. 1.

   Define an extensive property and give an example.

   Hint

   Think about properties that change with size or amount.

2. 2.

   What is an intensive property? Provide an example.

   Hint

   These properties are characteristic of the substance itself.

3. 3.

   Which of the following is an extensive property?

   • Density
   • Volume
   • Temperature

   Hint

   Think about properties that vary with quantity.

4. 4.

   True or False: The specific energy is an example of an extensive property.

   • True
   • False

   Hint

   Recall the definition of intensive properties.

5. 5.

   A tank has an influx of 10 m³/s and an outflux of 10 m³/s. If the tank's cross-sectional area is constant and does not deform, discuss what happens to the mass within the tank over time.

   Hint

   Think about how constant volume inflow and outflow affect mass.

6. 6.

   Derive the mathematical expression for the influx of a property B, given its dependence on cross-sectional area A and fluid velocity V.

   Hint

   Consider the definitions of flow and property influx in terms of area and velocity.