For the reaction 3 C₂H₂(g)→ C₆H₆(l)at 25°C,the standard enthalpy change is -631 kJ and the standard entropy change is -430 J/K.Calculate the standard free energy change at 25°C.

Question

Quizplus · Accepted Answer

The standard free energy change can be calculated using the equation: 
ΔG° = ΔH° - TΔS° 
where ΔH° is the standard enthalpy change, ΔS° is the standard entropy change, and T is the temperature in Kelvin.

Substituting the given values: 
ΔG° = -631 kJ - (298 K)(-0.43 kJ/K) 
ΔG° = -631 kJ + 128 kJ 
ΔG° = -503 kJ

Therefore, the standard free energy change at 25°C is -503 kJ, which is answer choice B.

For the Reaction 3 C2H2(g)→ C6H6(l)at 25°C,the Standard Enthalpy Change

For the Reaction 3 C₂H₂(g)→ C₆H₆(l)at 25°C,the Standard Enthalpy Change