cell mechanics

equation relating energy of a system

ΔU = Q- P ΔV

entropy

ΔS=Q/T

where Q is heat(energy flow)

enthalpy

ΔU = Q-PΔV which can be expanded to a useful equation:

ΔH=Q at constant pressure

Gibbs free energy definition

quantifies if a reaction will occur spontaneously or not

spontaneous or non spontaneous if ΔS<0

non spontaneous

spontaneous or non spontaneous if ΔS>0

spontaneous

spontaneous or non spontaneous if ΔH>0

heat absorbed-non spontaneous

spontaneous or non spontaneous if ΔH<0

heat produced - spontaneous

Gibbs free energy equation

ΔG=ΔH-TΔS

first law of thermodynamics in relation to the cell

ΔU=Q+W

boltzmanns microscopic definition of entropy

S=k ln(Ω)

where Ω is the number of possible configurations of a systemst

ructural requirements of membrane bilayer

semi porous

flexible and deformable

strong enough to withstand external forces and energy fluctuation

surface tension

y = energy/area J/m²

compression energy of bilayer