1. (8 points) The following reaction is important for photosynthesis in green pl

Question

1. (8 points) The following reaction is important for photosynthesis in green plants:CO2  + ribulose diphosphate W  2 phosphoglycerate GE  = !52 kJ/mol CO2

Calculate the value of K at 298 K, for:

phosphoglycerate W  ½ ribulose diphosphate + ½ CO2

7. (14 points) One easy way to calculate GErxn for a chemical reaction is to use standard freeenergy of formation (GEf) values that you can find in a table.
A GEf value for a substance cannot be measured directly in a single experiment. Instead,GEf values must be calculated from the results of two other experiments. Describe briefly whatthese two experiments are. Be sure to describe the specific substances that must be present andany conditions that must apply in these experiments so that one can use the results to calculateGEf for the substance of interest.

Explanation / Answer

Q1.

dG = -RT*¨ln(K)

K = exp(-dG/(RT))

dG = -52 kJ --> -52000 J

K = exp(-(-52000)/(8.314*298))

K = 1303462664.7

K = 1.3*10^9

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