Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/25

Click to flip

25 Cards in this Set

  • Front
  • Back
Density
Mass of a substance per unit volume.
Unit: lbm/ft3
enthalpy
Sum of the internal energy and flow energy of a substance.
Unit: BTU/lbm
Heat
Energy in transition; energy that flows from one location to another because a temp difference exists between those locations.
Unit: BTU
Heat of fusion
Heat required at melting temp to change one pound mass of a solid into liquid form.
Unit: BTU/lbm
Heat of Vaporization
Heat required at vaporization temp to change one pound mass of a liquid into gaseous form.
Unit: BTU/lbm
Internal Energy (u)
Energy possessed by a substance due to the random motion of the individual molecules of a substance.
Unit: BTU/lbm
Fluid
Any substance that conforms to the shape of its container
British Thermal Unit (BTU)
Amount of heat required to increase the temp of one pound mass of water by 1f under standard temp and pressure conditions
Latent Heat
Heat added to or removed from a substance that produces a change in the phase of the substance (but no change in temp).
Moisture Fraction
The fraction of the total mass of a water/steam mixture that is liquid water.
Phase
The condition of a substance as defined by its fluidity.
Process
Series of state changes that occur when the properties of a system change.
Quality (x)
the fraction of the total mass of a water/steam mixture that is steam.
Saturated (Dry) Steam
100% steam at saturation temp/saturation pressure conditions.
Saturated Liquid Water
100% liquid water at saturation temp/saturation pressure conditions.
Sensible Heat
Heat added to or removed from a substance that produces a change in its temperature (but no change in phase).
Specific Heat Capacity (cp)
Heat required to raise the temp of one pund mass of a material by 1F.
Unit: BTU/lbmF
Specific Volume (v)
Volume occupied per unit mass of a substance.
Unit: ft3/lbm
State
A particular condition of a substance described by the (unique) values of its thermodynamic properties.
Subcooled Liquid Water
Water that exists at a temperature below aturation temp for the pressure of the water, or, equivalently, exists at a pressure above sat pressure fo the temp of the water
Subcooling Margin (SCM)
The difference between the saturation temp and the actual temp of subcooled water;
SCM = Tsat - Tactual
Superheated Steam
Steam existing at a temp above sat temp for the pressure of the steam.
Temperature (T)
A measure of the average kinetic energy of the molecules of a substance.
Unit: F, R, C, K
Wet Steam
A mixture of liquid water and steam, both at sat temp/pressure conditions.
Working Fluid
Any fluid which receives, transports and transfers energy in a fluid flow system.