Engineering Design:Question 2 Which is a criterion in engineering design?
Select one:
A principle to follow as something is built, to ensure it works as intended.
Determining the cost and schedule when building something.
O O O
A limit to what can be done or what can be used when building something.
Understanding the scientific principles behind something that is being built.

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.