For the equilibrium
`H_(2) O (1) hArr H_(2) O (g)`
at 1 atm `298 K`

Options

A. standard free energy change is equal to zero `(Delta G^(@) = 0)`
B. free energy change is less than zero `(Delta G lt 0)`
C. standard free energy change is less than zero `(Delta G^(@) lt 0)`
D. standard free energy change is more than zero `(Delta G^(@) gt 0)`

Answer

A

Explanation

For a reversible process at at equilibrium, under standard conditions (1 atm and `298 K`), `Delta G^(@) = 0`.