In photosynthesis, plants form glucose (C6H12O6) and oxygen from carbon dioxide
ID: 919360 • Letter: I
Question
In photosynthesis, plants form glucose (C6H12O6) and oxygen from carbon dioxide and water.
Part A
Write a balanced equation for photosynthesis.
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Correct
Part B
Calculate Hrxn at 25 C.
Express your answer using one decimal place.
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Part C
Calculate Srxn at 25 C.
Express your answer using one decimal place.
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Part D
Calculate Grxn at 25 C.
Express your answer using one decimal place.
In photosynthesis, plants form glucose (C6H12O6) and oxygen from carbon dioxide and water.
Part A
Write a balanced equation for photosynthesis.
6CO2+H2OC6H12O6+O2 6CO2+6H2OC6H12O6+O2 6CO2+6H2OC6H12O6+6O2 CO2+H2OC6H12O6+6O2SubmitMy AnswersGive Up
Correct
Part B
Calculate Hrxn at 25 C.
Express your answer using one decimal place.
Hrxn = kJSubmitMy AnswersGive Up
Part C
Calculate Srxn at 25 C.
Express your answer using one decimal place.
Srxn = J/KSubmitMy AnswersGive Up
Part D
Calculate Grxn at 25 C.
Express your answer using one decimal place.
Grxn =Explanation / Answer
Part A
Write a balanced equation for photosynthesis.
6CO2+6H2OC6H12O6+6O2
Part B
Calculate Hrxn at 25 C
H°rxn = m H°f (products) - n H°f (reactants)
H°rxn = [1mol*H°fC6H12O6 +6moles H°fO2] - [6moles H°fCO2 +6moles H°fH2O]
H°rxn = [1 mol *-1275.0kJ/mol + 6moles *0kJ/mol] - [6moles*-393.5kJ/mol + 6moles*-285.8kJ/mol]
H°rxn =2800.8kJ
Part C
Calculate Srxn at 25 C.
S°rxn = m S°f (products) - n S°f (reactants)
S°rxn = [1mol*S°fC6H12O6 +6moles S°fO2] - [6moles S°fCO2 +6moles S°fH2O]
S°rxn = [1 mol *288.9J/molK + 6moles *205.3J/molK] - [6moles*213.64J/molK + 6moles*69.94J/molK]
S°rxn =-180.78J/K
Calculate Grxn at 25 C.
G°rxn = m G°f (products) - n G°f (reactants)
G°rxn = [1mol*G°fC6H12O6 +6moles G°fO2] - [6moles G°fCO2 +6moles G°fH2O]
G°rxn = [1 mol *-919.2kJ/mol + 6moles *0kJ/mol] - [6moles*-394.383kJ/mol + 6moles*-237.19 kJ/mol]
G°rxn =2870kJ