Exam (elaborations)
NUSC 3233 Lecture 5-6 Exam With Complete Solution
- Course
- Institution
NUSC 3233 Lecture 5-6 Exam With Complete Solution ...
[Show more]
Content preview
NUSC 3233 Lecture 5-6 ExamWith Complete Solution
Solvent - Answer Water
__ that allows chemical reactions to occur
The most universal dispersion medium in food systems
Useful in cooling as well as in heating foods
Influences appearance, texture, and flavor of foods
-states of matter; solid liquid gas
- plays important roles in food prep
Cannot - Answer Moisture Content of Foods
Foods of plant and animal origin are made mainly of water. 60-95% of meats,
vegetables and fruits
___ be judged by appearance
o Strawberries versus cabbage
o Milk versus green beans
o Butter versus flour
neutral - Answer Nature of Water
Overall a molecule of water is electrically __
Thus, water is a polar molecule capable of forming 4 hydrogen bonds with other
molecules
negative - Answer water
Distribution of charges: Oxygen tends to attract electrons making it slightly ___
positive - Answer water
Hydrogen side is slightly ___
hydrogen - Answer Thus, water is a polar molecule capable of forming 4 ___ bonds with
other molecules
, states - Answer 2 hydorgen bonds with oxygen , the 3 __ of water depend on the extent
to which the molecules of hydrogen are bonded
hydrogen - Answer Nature of Water
Freezing and boiling points of water are higher than those of similar compounds
because of strength of ___ bonding
bonded - Answer three states of water
The 3 states of water depend on the extent to which the molecules of hydrogen are __
breaking - Answer Liquid state of water
Between 0 and 100°C.
Flow properties are due to H bonds that link adjacent molecules
H bonds are constantly __ and reforming
Crystalline - Answer ___: Lowest energy
densest - Answer Solid state of water: ice
Crystalline: Lowest energy
Motion of molecules is slowed
Hydrogen bonds last longer
Water is ___ at 4°C (1 g/mL)
Molecules begin to associate in a precise arrangement
latent - Answer Solid state of water: __ heat of fusion
At 0°C the actual phenomenon of freezing takes place
79.6 cal/g (332.6 j/g) are removed from the system
This removal of heat is not accompanied by change of temperature
When ice is melting this heat is needed to disrupt H bonds and melt the ice, but not to
increase the temperature
After ice melts, temperature begins to rise
freezing - Answer the latent heat of fusion is the __/melting of water and ice
less - Answer As a result of expansion (9%) ice is __ dense than water
-tomato in the freezer
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Zayla. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75632 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now