Chapter 1/2

Question 1

processes

Answer 1

convert feedstocks into products; the set of operations that accomplish a transformation to produce a product
feedstocks -> intermediates -> products

Question 2

overall process scale

Answer 2

a network of hardware units communicating through mass flows, energy flows, control signals (electrical pressure, electromagnetic) that converts feed into product

Question 3

process-unit scale

Answer 3

individual reactors, distillation columns, absorption columns, extraction vessels, heaters, crystallizers, etc..

Question 4

molecular scale

Answer 4

interacting molecules of reactants, products, surrounding medium (solvent)

Question 5

submolecular scale

Answer 5

interactions between nuclei and electrons to make new arrangements and create the desired products

Question 6

batch process

Answer 6

In a bath process, raw materials are fed in, the process is “sealed” and runs with no mass entering or leaving (but energy can be transferred). At the end the process is opened and product is removed.

Question 7

continuous process

Answer 7

raw materials continuously enter and product continuously leaves the process

Question 8

semibatch process

Answer 8

a process that does not fall fully under either “batch” or “continuous” classification

Question 9

steady-state process

Answer 9

Under steady-state operation, conditions at a point in side the process are assumed not to change with time. Conditions can and do change from one location to another (e.g. from one process stream to another), however

Question 10

transient or unsteady-state process

Answer 10

conditions inside the process change with time

Question 11

batch and semibatch processes are ___.

Answer 11

transient

Question 12

continuous processes are ___ or ___.

Answer 12

transient or steady-state