introduction 9/5

Question 1

most to least strong bonding types

Answer 1

covalent > ionic > hydrogen > van der waals > hydrophobic interactions

Question 2

what is enthalpy?

Answer 2

• change in H
• bond strength
• exo/endo thermic
• energy is used to break a bond and enthalpy increases when bonds break (+H)
• energy is relased when bonds form and enthalpy decreases during formation (-H)
• causes same change in G

Question 3

what is entropy?

Answer 3

• disorder
• increases as bonds break (+S) and decreases as bonds form (-S)
• indirectly changes G

Question 4

free energy

Answer 4

• G=H-TS
• exer/endogonic
• more -G = net forward
• more +G = net backwards

Question 5

how does cis/trans configuration affect a molecule?

Answer 5

in fatty acids a forced double bond cis kink is normal and trans configurations can cause problems