Question

Change in Gibbs energy for a certain reaction at 300 K is –24 kJ and change in enthalpy is –16 kJ. What is the entropy change of the reaction?

Options

• 26.6 J

• 18.2 J

• 40.6 J

• 32.1 J

Answer 1

26.6 J

Explanation:

ΔG = ΔH – T ΔS

–24 = –16 – (300 × ΔS)

–24 + 16 = –300 ΔS

–8 = –300 ΔS

ΔS = `8/300` = 0.02667 kJ

= 26.67 J