Question

the chemistry and energy of life - part 2

1. in your own words, name the first and second law of thermodynamics.
2. what is activation energy? what is the relationship of a catalyst to activation energy?
3. contrast catabolic and anabolic reactions in terms of complexity and energy. which one is endergonic and which one is exergonic?

the chemistry and energy of life - part 3

1. look at the picture below and answer the questions: which functional group is present in vinegar? what will happen if you mix vinegar and water? what will happen to the ph of your mixture?

this is vinegar
functional group properties
polar. hydrogen bonds with water to help dissolve molecules. enables linkage to other molecules by condensation.
hydroxyl
acidic. ionizes in living tissues to form -coo-. enters into condensation reactions by giving up -oh. important in energy - releasing reactions.
carboxyl

Explanation:

1. 1st Law: Energy is conserved. 2nd Law: Entropy increases.
2. Activation energy is energy barrier; catalyst lowers it.
3. Catabolic: complex to simple, exergonic. Anabolic: simple to complex, endergonic.
4. Carboxyl group. Mixing with water dilutes; pH rises.

Answer:

1. First Law: Energy conservation. Second Law: Entropy increase.
2. Activation energy: Reaction energy - barrier. Catalyst lowers it.
3. Catabolic: Complex - to - simple, exergonic. Anabolic: Simple - to - complex, endergonic.
4. Carboxyl group. Dilutes in water, pH rises.