The specific temperature to which a vapor-gas mixture must be cooled (at constant humidity) to reach saturation is termed the ______________ temperature?
Show answer Hide answer
Answer: D. None of these
Explanation
The temperature to which a vapor-gas mixture must be cooled at constant humidity to reach saturation is called the dew point temperature.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
Related questions
Q1. Wetted-wall column apparatuses are experimentally used to determine_________________________?
Show answer Hide answer
Answer: A. Individual mass transfer co-efficient (M.T.C.) in gaseous system
Wetted-wall columns provide a smooth and geometrically known interfacial area for gas contact. This precise geometry eliminates area uncertainty when calculating individual gas-side mass transfer coefficients. Experiment...
Q2. Under steady-state equimolal counter-diffusion of two gases A and B, the value of NA/(NA + NB) is____________?
Show answer Hide answer
Answer: B. ∞
Equimolal counter-diffusion means that molar fluxes of gases A and B are equal magnitude opposites. Adding equal and opposite fluxes together results in a net zero denominator value. Dividing a finite flux by a vanishing...
Q3. Although adsorption and desorption isotherms theoretically overlap, adsorption hysteresis often occurs where the desorption equilibrium pressure is ______________ the adsorption pressure?
Show answer Hide answer
Answer: A. Lower than
Adsorption hysteresis loop geometry inherently places the desorption path at lower pressures. Capillary condensation within mesopores retains adsorbate molecules more strongly during the removal phase. Equilibrium pressu...
Q4. Achieving high tray efficiency in fractional columns requires___________________?
Show answer Hide answer
Answer: A. Interfacial surface between liquid and gas phase should be large
Fractional distillation columns require intensive mass transfer facilitated by large phase contact areas. Providing a large interfacial surface area accelerates component transfer across vapor-liquid interfaces. Enhanced...
Q5. An air-vapor mixture exhibits wet and dry bulb temperatures of 25°C and 30°C. Upon isobaric heating to 45°C, the wet-bulb temperature becomes ______________ °C ?
Show answer Hide answer
Answer: B. > 25
Adding thermal energy isobarically to an air-vapor mixture increases its overall system enthalpy. The wet-bulb temperature rises correspondingly as sensible heat is transferred to the fluid. Psychrometric principles dict...
Q6. Extraction solvents should avoid high latent heats of vaporization because ______________________?
Show answer Hide answer
Answer: C. Its recovery cost by distillation may be prohibitively high
High latent heats mean solvents require immense thermal energy input to vaporize during separation. Solvent recovery via distillation becomes economically unviable due to exorbitant reboiler duty requirements. Excessive...