Chapter 6: 6.2 Thermodynamics Flashcards
What is the bilayer formation stabilized by?
The Hydrophobic Effect
Describe:
Hydrophobic Effect
By preventing of nonpolar groups with water, the entropy of water is increased
——— and ——– stability contribute to membrane formation
- Enthalpic
- Entropic
What does ΔH represent in thermodynamics?
Enthalpic stability
What does TΔS represent in thermodynamics?
Entropic stability
Enthalpy refers to…
Bonds that are formed
* The more negative, the greater the stability
Enthalpy refers to…
Molecular motion
* The more positive, the greater the stability
What does ΔG represent in thermodynamics?
Stability
How can stability (ΔG) be determined?
Using this formula:
ΔG = ΔH + (-TΔS)
Bilayer formation is spontaneous when…
ΔG is negative
Describe:
Energy change in Spontaneous Reactions
Initial state:
* Higher energy, less stable
Final state:
* Lower energy, more stable
Describe:
Energy change in Non-Spontaneous Reactions
Final state:
* Higher energy, less stable
Initial state:
* Lower energy, more stable
More freedom of movement mean:
1. More entropy
2. Less entropy
More entropy
What is more entropy represented by in the equation for ΔG?
Bigger TΔS
What effect does more entropy have on ΔG?
More negative ΔG