Question

Pick out the wrong statement

• A. The standard free energy of formation of elements is zero
• B. A process that leads to increase in free energy will be spontaneous
• C. A process accompanied by decrease in entropy will be non-spontaneous under normal conditions.
• D. Enthalpy of combustion is always negative

Answer 1

Answer: (B)

$ \Delta G $ gives a criteria for spontaneity at constant pressure and temperature.
(I) If $ \Delta G $ is negative $(< 0)$, the process is spontaneous.
(II) If $ \Delta G $ is positive $(> 0)$, the process is non-spontaneous.