State the criteria for a spontaneous process in terms of $\Delta G$ at constant pressure and temperature.

Calculate the amount of work done during isothermal expansion of a gas from a volume of $4 \ dm^{3}$ to $6 \ dm^{3}$ against a constant external pressure of $3 \ atm$ (in $J$)?

What is the value of $\Delta G$ for a water system in an environment at a temperature of $100 \ K$?

Which of the following conditions indicates the reaction is spontaneous?

The process is spontaneous at the given temperature,if

Calculate the work done during the reversible isothermal expansion of $2 \ mol$ of an ideal gas at $298 \ K$ from $10 \ L$ to $20 \ L$ in $J$. (in $.9$)