2.5 mol of ideal gas at 2 atm and $27^{\circ}C$ expands isothermally to 2.5 times of its original volume against the external pressure of 1 atm. Calculate q

Question

$\begin {array} {1 1} (A)\;4698.44 \: J & \quad (B)\;-4698.44 \: J \\ (C)\;-5714.15 \: J & \quad (D)\;5714.15 \: J \end {array}$