Thermodynamics

Question 1

Bond enthalpy

Answer 1

2 x ∆H˚at

Question 2

∆H˚LD

Answer 2

∆H˚LD = ∑∆H - ∆H˚f

Question 3

∆H˚LF

Answer 3

∆H˚LF = ∆H˚f - ∑∆H

Question 4

∆H˚sol

Answer 4

∆H˚sol = ∆H˚LD + (∑∆H˚hyd)

Question 5

∆S

Answer 5

∆S = ∑S(products) - ∑S(reactants)

Question 6

∆H

Answer 6

∆H = ∑ ∆fH (products) - ∑ ∆fH (reactants)

Question 7

∆G

Answer 7

∆G = ∆H - T∆S

Question 8

Temperature at which a reaction becomes feasible

Answer 8

T = ∆H / ∆S