Question

question 9 a reaction is spontaneous if δg is equal to zero. greater than zero. less than zero. equal to the δh of the system.

Explanation:

In thermodynamics, the Gibbs free energy change ($\Delta G$) determines the spontaneity of a reaction. A reaction is spontaneous (occurs without external energy input) when $\Delta G < 0$ (negative). If $\Delta G = 0$, the system is at equilibrium. If $\Delta G > 0$, the reaction is non - spontaneous. And $\Delta G$ is related to $\Delta H$ (enthalpy change) and $T\Delta S$ (entropy - temperature term) by the equation $\Delta G=\Delta H - T\Delta S$, so it is not equal to $\Delta H$ for spontaneity determination.

Answer:

C. Less than zero. (Here we assume the options are labeled as A. Equal to zero, B. Greater than zero, C. Less than zero, D. Equal to the $\Delta H$ of the system)