Equations

Question 1

What is the equation for specific volume?

Answer 1

Specific Volume = Volume / Mass
Specific Volume = 1 / Density

Question 2

What is the pressure on a gage?

Answer 2

Gage = Absolute-Atmosphere

Question 3

What is vac pressure?

Answer 3

Vac = Atmosphere-Absolute

Question 4

How does pressure vary with depth?

Answer 4

Pressure end - Pressure start = -Density * 9.81 * Change in depth

Question 5

What is the energy of a system?

Answer 5

Total Energy = Potential + Kinetic + Internal Energy

Question 6

What is the equation for mechanical energy on a unit mass basis?

Answer 6

(Pressure/Density) + (Velocity^2 / 2) + (Gravity*Height)

Flow Energy + Kinetic Energy + Potential Energy

This is also the Bernoulli Equation

Question 7

What is the quality of a sample?

Answer 7

x = Mass of Vapour / Mass of Sample

Question 8

What is the ideal gas equation?

Answer 8

Pressure * Specific Volume = Gas Constant * Temperature

Question 9

How do you calculate R in the ideal gas equation?

Answer 9

R = Universal Gas Constant / Molar Mass

Question 10

What equation relates the pressure, specific volume and temperature of an ideal gas at two different states

Answer 10

Pv/T = Constant

This constant is the same for both states