Answer
$p_1=135\ atm$
Work Step by Step
We use the ideal gas law and the equation $p_1V_1=p_2V_2$ to obtain:
$Q = nRTln(\frac{p_1}{p_2}) \\ p_1 = p_2 e^{\frac{Q}{nRT}}\\p_1 = p_2 e^{\frac{mL_f}{nRT}} \\ p_1 = 1 \times e^{\frac{.01\times334,000}{.3\times8.314\times273}}$
$p_1=135\ atm$
