Ketchup contains tomatoes, corn syrup, vinegar, sugar, water, and a variety of seasonings. A recipe for homemade
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Question:
Suppose the canning jar diameter is 2¼ inches, and a half-inch of headspace is left after the ketchup has been added to the jar. Room temperatureis25 degrees C. In the calculations that follow, assume that water is the only volatile component of ketchup and that the head space volume remains constant at its initial value.
(a) During this process, what is the lowest pressure (atm) in the head space of the jar?
b) Estimate the molar composition of the gas in the head space when the canning process is complete, stating all assumptions you make.
(c) Calculate the energy (kJ) transferred from the head space during the cooling process. Again, state your assumptions.
(d) Speculate on the likely reason for boiling the ketchup.
(e) When the band is removed from the top of a jar of ketchup, the lid remains firmly attached to the top of the jar and sometimes may need to be pried off. Why?
Related Book For
Chemistry The Central Science
ISBN: 978-0321696724
12th edition
Authors: Theodore Brown, Eugene LeMay, Bruce Bursten, Catherine Murphy, Patrick Woodward
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