For Sulfur Hexafluoride, SF₆, the Standard Gibbs Energy of Formation

question 19

Multiple Choice

For sulfur hexafluoride, SF₆, the standard Gibbs energy of formation of is -992 kJ mol^-1 and the standard entropy of formation is -350 J K^-1 mol^-1 at 298 K. Assuming that the values of the enthalpy and entropy of formation vary little with temperature, estimate the standard Gibbs energy of formation of sulfur hexafluoride at 348 K.

• A) -992 kJ mol^-1
• B) -18 kJ mol^-1
• C) -975 kJ mol^-1
• D) -1010 kJ mol^-1

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