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Answer :
Final answer:
The change in free energy (ΔG) for a reaction with ΔH = 20 J/mol at 27 degrees Celsius, assuming zero change in entropy (ΔS), is 20 J/mol.
Explanation:
To calculate the change in free energy (ΔG) for a reaction where the change in enthalpy (ΔH) is 20 J/mol, and the reaction is carried out at 27 degrees Celsius, we need to use the formula:
ΔG = ΔH - TΔS
First, convert the temperature to Kelvin:
T(K) = 27°C + 273 = 300 K
Since ΔS (change in entropy) is not provided in the question, we'll assume that ΔS is zero (e.g., for a hypothetical scenario), thus the formula simplifies to:
ΔG = ΔH - (300 K × 0 J/(mol•K))
ΔG = ΔH = 20 J/mol
Hence, the delta G for the reaction at 27 degrees Celsius would be 20 J/mol, which corresponds to option (b).
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