Solution Found!
Strawberries contain about 15 wt% solids and 85 wt% water.
Chapter 4, Problem 4.9(choose chapter or problem)
Strawberries contain about 15 wt% solids and 85 wt% water. To make strawberry jam, crushed strawberries and sugar are mixed in a 45:55 mass ratio, and the mixture is heated to evaporate water until the residue contains one-third water by mass.
(a) Draw and label a flowchart of this process.
(b) Do the degree-of-freedom analysis and show that the system has zero degrees of freedom (i.e., the number of unknown process variables equals the number of equations relating them). If you have too many unknowns, think about what you might have forgotten to do.
(c) Calculate how many pounds of strawberries are needed to make a pound of jam.
Questions & Answers
QUESTION:
Strawberries contain about 15 wt% solids and 85 wt% water. To make strawberry jam, crushed strawberries and sugar are mixed in a 45:55 mass ratio, and the mixture is heated to evaporate water until the residue contains one-third water by mass.
(a) Draw and label a flowchart of this process.
(b) Do the degree-of-freedom analysis and show that the system has zero degrees of freedom (i.e., the number of unknown process variables equals the number of equations relating them). If you have too many unknowns, think about what you might have forgotten to do.
(c) Calculate how many pounds of strawberries are needed to make a pound of jam.
ANSWER:Step 1 of 3
a)
The flow of the given process as follows.
Here the mass fraction of solids (assume as sugar) in strawberries (of mass m.) is 0.15 and
the mass fraction of water in strawberries is 0.85.
And the mass fraction of sugar in strawberry jam (of mass 1.00 lb) is 0.667 and mass fraction of water in strawberries is 0.33.