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Zeroth Law of Thermodynamics - correct answer If two thermodynamic systems are each in thermal equilibrium with a third, then they are in thermal equilibrium with each other. Must have same temp Specific Volume - correct answer reciprocal of density; volume per unit mass m3/kg Enthalpy - correct answer total energy of a system, J internal energy - correct answer the sum of the kinetic and potential energies of all particles in the system; kJ/kg Entropy - correct answer Measure of energy no longer available for useful work specific heat - correct answer The amount of energy required to raise the temperature of 1 gram of a substance by 1 degree celcius; q=mc(t-t) Ideal Gas Law - correct answer PV=nRT isentropic process - correct answer constant entropy polytropic process - correct answer pV^n=constant adiabatic process - correct answer a thermodynamic process during which no energy is transferred to or from the system as heat (thus no heat loss) first law of thermodynamics - correct answer The principle of conservation of energy. Energy can be transferred and transformed, but it cannot be created or destroyed. second law of thermodynamics - correct answer when energy is transformed, the quantity of energy remains the same, but its ability to do work diminishes; entropy is increased Carnot cycle - correct answer a cycle (of expansion and compression) of an idealized reversible heat engine that does work without loss of heat Otto Cycle - correct answer a thermodynamic cycle, consisting of a pair of adiabatic processes and a pair of isochoric processes, that converts heat into work, e.g., the four-stroke engine cycle of intake, compression, ignition, and exhaust Rankine Cycle - correct answer 1-2 Isentropic compression in a pump 2-3 Constant pressure heat addition in a boiler 3-4 isentropic expansion in a turbine 4-1 constant pressure heat rejection in a condenser power cycle - correct answer develop a net energy transfer by work in the form of electricity using an energy input by heat transfer from hot combustion gases Q= - correct answer Mc(t-t) mole fraction - correct answer the ratio of the number of moles of solute in solution to the total number of moles of solute and solvent Dalton's law of partial pressure - correct answer Total pressure of gas mix is the sum of the partial pressures Gibbs rule - correct answer Total properties of a mixture = sum of properties that individual gases would have if each occupied total mix Specific mixture properties - correct answer Gravimetrical Molar Properties - correct answer Volumetrically weighed Dry Bulb Temperature - correct answer The temperature of air measured by a thermometer freely exposed to the air wet bulb temperature - correct answer The lowest temperature that can be obtained by evaporating water into the air.; gone through adiabatic saturation dew point temperature - correct answer the temperature to which air has to be cooled in order to reach saturation, starts to condense If the vapor pressure equals the saturation pressure... - correct answer The air is said to be saturated saturated air - correct answer All temps are equal Unsaturated air - correct answer Dew point is less than the wet bulb temp Humidity Ratio/specific humidity - correct answer Mass ratio of water vapor to dry air Mass ratio units - correct answer Kg/kg or grains ——-grains per pound - correct answer 7000 Ratio for specific gas constant for air and water vapor - correct answer .622 relative himidity - correct answer Partial pressure of water vapor divided by saturation pressure Gibbs free energy equation - correct answer G=H-TS= U+pV-TS for constant temp, pressure and nonflow process Helmholtz Free Energy equation - correct answer A=U-TS=H-pV-TS; constant temp, volume, nonflow If no medium is required the heat transfer occurs by ? - correct answer Radiation Convection - correct answer Energy transferred from one point to another by a moving fluid Conduction - correct answer Heat transferred by solid material through molecular vibrations natural convection - correct answer Relays on heat transfer from density changes causing fluid motion Energy transfer rate - correct answer q varies with time Initial period of energy transfer - correct answer Transient period Eventual energy transfer becomes - correct answer Steady state or equilibrium rate Fourier's Law - correct answer (aka law of heat conduction) The transfer of heat moves through matter from higher temperatures to lower temperatures in order to equalize differences.;!for a flat slab, written with - sign to indicate heat flow is opposite the direction of the thermal gradient Thermal Resistance - correct answer resistance to the flow of heat; AKA r-value; L/kA Composite slab thermal resistance - correct answer Sum of individual resistances Fourier's equation - correct answer Based on uniform length and constant cross section If the heat flow is not a constant area what is used - correct answer Logarithmic mean area ; A(m)= (A(2)-A(1))/(ln(A(2)/A(1)) For pipe insulation heat loss is increased with insulation unless ... - correct answer The thickness is above the critical thickness using the critical radius Newton's law of convection - correct answer Calculated forced convection heat transfer( pump, fan, motion vehicle moved fluid) thermal radiation - correct answer electromagnetic waves produced by objects because of their temperature; wavelength 700nm -10^5 nm monochromatic radiation - correct answer radiation composed of a single wavelength Opaque solids and some liquids —— is 0 - correct answer Transmissivity Reflectivity - correct answer =0 for gases in radiation Black body - correct answer Absorbs all of the radiant energy that impinges on it ; emits max possible energy when acting as a source Emissivity - correct answer Ratio of radiation emitted by a surface to the radiation emitted by a black body at the same temperature. For a black body the emissivity = - correct answer Absorptivity =1 For any body in equilibrium emissivity = - correct answer Absorptivity Black bodies do not have any - correct answer Reflectivity and transmissivity Radiant heat transfer - correct answer Process where heat emanates from an object that cannot hold any more thermal energy - lizard absorbing heat from sun; heat transfer by way of thermal radiation If 2 bodies can see each other they will - correct answer Radiate energy to and absorb energy from the orher fins - correct answer Extended surface, object that recieve and move thermal energy by conduction along there length and width prior to convective and radioactive heat thermal Straight fins - correct answer Rectangular and have a constant A To find the exact solution of a fin replace the actual fin length with a - correct answer Modified length Q(dot) = - correct answer mh/t energy transfer - correct answer Movement of energy from one place or object to another Transport phenomena - correct answer transport of heat, fluids, and mass; include unit operations Transport phenomena unit operations - correct answer Fluid flow, heat transfer, evaporation, drying, distillation, absorption, membrane separation, liquid-liquid extraction, liquid-solid extraction, liquid solid leaching, crystallization, mechanical separation process enthalpy change - correct answer Q(dot) = m(dot) (h1-h2) Conductive thermal resistance - correct answer L/k Thermal resistance through convective films equation - correct answer