Q1: If G = insoluble gas in gas stream and L = non-volatile solvent in liquid stream, then the slope of the operating line for the absorber is

ANS:A - L/G

The slope of the operating line for the absorber, when dealing with an insoluble gas (G) in the gas stream and a non-volatile solvent (L) in the liquid stream, is typically given by L/G. Here's why:

• In absorption processes, the operating line represents the relationship between the concentrations of the solute in the gas and liquid phases at equilibrium for each stage of the absorber.
• The slope of the operating line is defined as the change in solute concentration in the liquid phase divided by the change in solute concentration in the gas phase as we move along the line.
• Since the gas phase contains the insoluble gas (G) and the liquid phase contains the solvent (L), the change in concentration in the liquid phase (L) is divided by the change in concentration in the gas phase (G) to determine the slope of the operating line.
• Therefore, the slope of the operating line is given by L/G in this scenario.