Problem: In photosynthesis, plants form glucose (C6H12O6) and oxygen from carbon dioxide and water.a). Calculate ΔH°rxn at 15 °C.b). Calculate ΔS°rxn at 15 °C.c). Calculate ΔG°rxn at 15 °C.

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6 CO+ 6 H2O   C6H12O6 + 6 O2 


The ΔH˚f and S˚ of each reactant and product:

Substance

ΔH˚f (kJ/mol)

S˚ (J/mol • K)

C6H12O6

– 1271.0

209.2

O2

0

205.2

CO2

– 393.5

213.8

H2O

– 285.8

70.0

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Problem Details

In photosynthesis, plants form glucose (C6H12O6) and oxygen from carbon dioxide and water.

a). Calculate ΔH°rxn at 15 °C.

b). Calculate ΔS°rxn at 15 °C.

c). Calculate ΔG°rxn at 15 °C.

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