Question

What do the magnitudes and signs of ΔHrxn° and ΔSrxn° indicate about the temperature at which a process favors products? (5-7 sentence + example)

Answer 1

delta G0 = (deltaH)rxn0 - T(deltaS)rxn0
for reaction to be product favour (delta G0) < 0
for (delta G0) < 0 three cases arises

case 1
(deltaH)rxn0 < 0 and T(deltaS)rxn0 < 0
if both are negative than delta G0 is also neagtive
temperature can be anything

case 2
(deltaH)rxn0 < 0 and T(deltaS)rxn0 > 0
for (delta G0) to be negative temperature should be low

case 3
(deltaH)rxn0 > 0 and T(deltaS)rxn0 < 0
for (delta G0) to be negative temperature should be high