For hydrogen sulfide, H₂S, the standard enthalpy of formation is -20.2 kJ mol^-1 and the standard entropy of formation is +43.0 J mol^-1 at 298 K. Calculate the standard Gibbs energy of formation at this temperature.

Question

Quizplus · Accepted Answer

The standard Gibbs energy of formation is given by the equation:ΔG°f = ΔH°f - TΔS°fwhere ΔH°f is the standard enthalpy of formation, ΔS°f is the standard entropy of formation, and T is the temperature in Kelvin.Substituting the given values into the equation, we get:ΔG°f = -20.2 kJ mol^-1 - (298 K)(+43.0 J mol^-1 K^-1) = -33.0 kJ mol^-1Therefore, the correct answer is A.

For Hydrogen Sulfide, H2S, the Standard Enthalpy of Formation Is

For Hydrogen Sulfide, H₂S, the Standard Enthalpy of Formation Is