1) A spherical tank contains 10 kg of propane (C3H8) and 7 kg methane (CH4) at 25C. Calculate the mol fractions of propane and methane in the tank.

1)

A spherical tank contains 10 kg of propane (C3H8) and 7 kg methane (CH4) at 25ºC. Calculate the mol fractions of propane and methane in the tank. 

2)

In the situation described in question 1 above, the pressure within the spherical gas tank is 2 bara. What is the diameter of the tank? (You may assume ideal gas behaviour, and R, the universal gas constant, = 8.314x10-5 barm3mol-1K-1) 

3)

2 kmol of propane (C3H8) is completely combusted with 15 kmol oxygen. What is the percentage excess of oxygen supplied? 

4)

In the combustion scenario described in question 3, how many kmol of water would be produced by the complete combustion of 2 kmol of propane? 

5)

A 100 kg mixture of 27.8 % (by mass) of acetone (A) and 72.2% (by mass) of chloroform (B) is to be extracted with a mixed solvent, which is known to contain water (S1) and acetic acid (S2). The mixture and the solvent are mixed well to obtain equilibrium and then separated into two streams with the following composition (% by mass): 

Upper stream (U): A 7.5, B 3.5, S1 57.4, S2 31.6 

Lower stream (L) A 20.3, B 67.3, S1 2.8, S2 9.6 

Find out the quantities of the stream U