1. In photosynthesis, plants form glucose (C6H12O6) and oxygenfrom carbon dioxide and water.

a). Calculate ?H?rxn at15 ? C.

b). Calculate ?S?rxn at15 ? C.

c). Calculate ?G?rxn at15 ? C.

2. Consider the following reaction:
2NO(g)+O2(g)?2NO2(g)
Estimate ?G? for this reaction at each of thefollowing temperatures and predict whether or not the reaction willbe spontaneous. (Assumethat ?H? and ?S? do notchange too much within the give temperature range.)

a). 726 K

b). 843 K

3. Consider the following reaction:
CH3OH(g)?CO(g)+2H2(g)

Calculate ?G for this reaction at25 ?C under the following conditions:
PCH3OH= 0.815 atm
PCO= 0.125 atm
PH2= 0.175 atm