# MCAT equations

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1. Saturation Kinetics
v=(vmax[S])/K+ [S]

*at 1/2 vmax, [S]=km
2. Hardy-Weinberg equilibrium
• p2+2pq+q2=1
• p+q=1

• p=freq. of dom. allele
• q=freq. of rec. allele
• p2=freq. of dom homo
• 2pq=freq. of hetero
• q2=freq. of rec. homo
3. Moles
mass of sample/molar mass
4. Energy of electron
E=-RH/n2
5. Electromagnetic energy of photons
E=hc/λ
6. constant-volume and pressure calorimetry
q=mcΔT

• q=heat absorbed or released
• m=mass
• ΔT=change in temp.
7. Standard heat of reaction(ΔH°f)
ΔHrxn=(sum of ΔHf of products) - (sum of ΔHof reactants)
8. Bond enthalpy
ΔHrxn=ΣΔHbonds broken-ΣΔHbonds formed
9. Entropy(S)
ΔSuniverse=ΔSsystem+ΔSsurroundings
10. Gibbs free energy(G)
ΔG=ΔH-TΔS

• *negative G=spontaneous
• *pos. G = nonspontaneous
• *G=0 means equilirbrium and ΔH=TΔS
11. Boyles Law
PV=k or P1V1=P2V2
12. Charles Law
V1/T1=V2/T2
13. Gay-Lussac's Law
P1/T1=P2/T1
n/V=k
15. Combined Gas Law
P1V1/T1=P2V2/T2
16. Ideal Gas Law
PV=nRT
17. Van der Waals equation of state
(P+(n2a)/V2)(V-nb)=nRT

• a=intermolecular attraction
• b=volume of gas particles themselves
18. Daltons Law of partial pressure
PT=PA+PB+PC

PA=PTXA

*
XA=(moles of A)/(total moles)
19. average molecular speeds
K=.5mv2=3/2kbT
20. Root-mean-squared speed
urms=sqrt(3RT/M)
21. Osmotic Pressure
Π=MRT
22. %comp by mass
Mass of solute/mass of solution X 100%
23. Molarity
# of mol of solute/liter of solution
24. Molality
# of mol of solute/ kg of solvent
25. Normality
# of grams of equivalent weights of solute/liter of solution
26. pH
pH=-log[H+]=log(1/H+)
27. H2O (l) ⇔H+ (aq) + OH(aq)
kw=[H+][OH-]=10-14
28. Henderson-Hasselbach equation
pH=pKa+log([conj base]/[weak acid])
29. Standard electromotive force (emf)
emf=Ered,cathode-Ered,anode
30. Gibbs free energy (electrochemistry)
deltaG=-nFEcell
31. Equations of Liner Motion
v=v0+at

x=v0t+.5at2

v2=V02 + 2ax

32. Newtons Law of Gravitation
F=Gm1m2/r2
33. Uniform Circular motion
ac=v2/r

Fc=mv2/r
34. Power
W/delta t
35. Kinetic energy
K=.5mv2

### Card Set Information

 Author: wiener123 ID: 299304 Filename: MCAT equations Updated: 2015-03-27 15:19:45 Tags: MCAT Folders: MCAT Description: cafdklshuioghasf Show Answers:

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