Engineering Calculations & Process Variables
The absolute temperature scale in American Engineering units
What is Rankine (oR)?
The general form for a material balance
What is input - output + generation - consumption = accumulation?
The standard temperature and pressure in SI units
What are 0oC and 1 atm?
The pressure at which a liquid boils at a given temperature
What is the vapor pressure (saturation pressure)?
The components for the total energy of a system
What are kinetic energy, potential energy, and internal energy?
Force applied over an area
What is pressure?
The procedure used to determine if you have enough information to solve a given problem
What is a degree-of-freedom (DOF) analysis?
The pressure exerted by one component of a gas mixture
What is partial pressure?
A plot of one system variable vs. another that shows conditions at which a substance is solid, liquid, and gas (vapor)
What is a phase diagram?
The energy that flows as a result of temperature difference between a system and its surroundings
What is heat?
What is specific gravity?
A process where the feed is charged at the beginning and the products are removed later
What is a batch process?
The numerical value and units for specific molar volume of an ideal gas at STP (only need to say one)
What is 22.4 L/mol, 22.4 m3/kmol, or 359 ft3/lbmol?
The formula that describes vapor-liquid equilibrium for a component of low solubility in a multiple component system
What is Henry's Law?
The change in enthalpy when 1 mole of a liquid solute is dissolved in r moles of liquid solvent at constant T
What is the heat of mixing?
The concentration unit defined as 106 * (fraction of the component)
What is parts per million (ppm)?
The ratio of moles of desired product formed to moles of undesired product formed
What is selectivity?
The equation that represents the law of corresponding states
What is PV = znRT?
The ratio of partial pressure to vapor pressure in an air-carbon dioxide system
What is relative saturation?
The definition of enthalpy (as a statement, don't just say variables)
What is the sum of internal energy and flow work?
Two variables you would have to plot against each other to create a linear plot from data generated using the equation y = a*emx , where a & m are constants
What is ln y vs x? (semi-log plot)
The number of independent material balances around a mixing point for a 3-component system
What is 3?
The three ideal gas assumptions
What are (1) molecules have negligible volume, (2) molecules don't exert forces on each other (don't interact), and (3) molecules don't collide elastically with container walls or each other?
The equation for Gibb's Phase Rule (must say what each variable means when stating equation)
DOF = 2 + c - PI - r, where c is the number of components present, PI is the number of phases present, and r is the number of independent equilibrated chemical reactions among the species
The reference states for the psychrometric chart in American units
What are Dry Air at 32oF and 14.7 psi and water as a liquid at 32oF and 14.7 psi?