A liquid mixture of benzene and toluene contains 60% benzene by mass. The mixture is to be partially evaporated to yield a vapor ( top product) containing 80% benzene and a residual liquid (bottom product) containing 10% benzene by mass. (a) Suppose the process is to be carried out continuously and at steady state, with a feed rate of 150 kg/h of the 60% mixture. Let be the mass flow rates in kg/h of the vapor and liquid product streams, respectively. 1. Draw and label a process flowchart 2. Write the general balance equation and state which terms of the general balance equation you discarded and why you discarded them. 3. Solve balances on total mass and on benzene to determine the expected values of . For each balance, (b) Suppose the process is to be carried out in a closed container that initially containes 100 kg of the liquid mixture. Let be the masses in kg of the final vapor and liquid phases, respectively. 1. Draw and label a process flowchart 2. Write the general balance equation and state which terms of the general balance equation you discarded and why you discarded them. 3. Solve integral balances on total mass and on benzene to determine the expected values of .
A liquid mixture of benzene and toluene contains 60% benzene by mass. The mixture is to
be partially evaporated to yield a vapor ( top product) containing 80% benzene and a residual
liquid (bottom product) containing 10% benzene by mass.
(a) Suppose the process is to be carried out continuously and at steady state, with a feed rate
of 150 kg/h of the 60% mixture. Let be the mass flow rates in kg/h of the
vapor and liquid product streams, respectively.
1. Draw and label a process flowchart
2. Write the general balance equation and state which terms of the general balance
equation you discarded and why you discarded them.
3. Solve balances on total mass and on benzene to determine the expected values of
. For each balance,
(b) Suppose the process is to be carried out in a closed container that initially containes 100
kg of the liquid mixture. Let be the masses in kg of the final vapor and liquid
phases, respectively.
1. Draw and label a process flowchart
2. Write the general balance equation and state which terms of the general balance
equation you discarded and why you discarded them.
3. Solve integral balances on total mass and on benzene to determine the expected values
of .
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