• Shuffle
Toggle On
Toggle Off
• Alphabetize
Toggle On
Toggle Off
• Front First
Toggle On
Toggle Off
• Both Sides
Toggle On
Toggle Off
Toggle On
Toggle Off
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

Play button

Play button

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.