Week 2

Question 1

Standard States

Answer 1

All metals are solid except Hg, only liquids in standard states are Hg and Br, (H,N,O,F,Cl,Br,I) are diatomic in std state form “never have fear of ice cold beer”

Question 2

Enthalpy (delta H)

Answer 2

3 ways to calculate bond enthalpies (reactants minus products) enthalpies of formation (products minus reactants) Hess’ Law (when given a list of reactions and add them up)

Question 3

Gibbs Free Energy (delta G)

Answer 3

G is negative = spontaneous; K>1 (equilibrium constant) G is positive = non spontaneous (or spontaneous in reverse rxn); K

Question 4

Gibbs Free Energy

Answer 4

delta G formation of an element in its standard state = 0

Question 5

Calculating Phase Change

Answer 5

deltaG = deltaH - TdeltaS delta G = 0 at equilibrium/phase change now you can solve for delta S, delta H, and use T in kelvin

Question 6

delta H and delta S chart

Answer 6

Question 7

sides of a triangle

Answer 7

third side has to be smaller than the sum of the other two sides