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30 Cards in this Set

  • Front
  • Back
Saturated Liquid
A liquid that has absorbed as much heat energy as it can without vaporizing it
Subcooled Liquid
If a liquid is not saturated, it is subcooled
Liquid vapor mixture
a liquid vapor of the same substance can coexist at the same temperature
Saturated Vapor
a vapor about to be condensed
Superheated vapor
A superheated vapor is one that has absorbed more energy than is needed merely to vaporize it
Volume =
Volume = MW specific volume
Enthalpy Equation
h = hf + xhg
An Ideal Gas has
High Temperatures and Low Pressures
A liquid boils when its vapor pressure is equal to
ambient pressure
What is the change in specific entropy?
∆s = H/T where T is in Kelvin
Adiabatic Process
No energy crosses the system boundary
Isentropic Process
Adiabatic process where there is no entropy production
Throttling Process
Adiabatic process where there is no entropy change but pressure drop
Constant Pressure Process
isobaric process
constant temperature process
isothermal process
constant volume process
isochoric process
First Law of Thermodynamics
Q = ∆U + W
What is the efficiency of a pump?
n = W ideal / W act
What type of process is this used for?

P2/P1 = (V1/V2)^k
Isentropic
What type of process is this used for?

W = -V (P2-P1)
Incompressible Fluid
What type of process is this used for?

P2/P1 = V1/V2
Ideal gas with const. temp
What type of process is this used for?

P1/T1 = P2/T2
Const. Volume
A Rankine cycle consists of
2 constant pressure and 2 isentropic process
Combustion portion of cycle
the vertical part
Absolute pressure
101 kPa
Dalton's Law
The total pressure of a gas mixture is the sum of the individual gases's partial pressures
How can relative humidity of an air sample be determined?
Measure the wet bulb and dry bulb temperatures and look up the corresponding relative humidity on a psychrometric chart
When to use Gibbs Rule?
How many phases
Rate of Heat Transfer
Q(dot) = m h / t
How to get Q watts into joules?
Q = Q(dot) * t