One mole of an ideal gas does work on its surroundings as it expands isothermally to a final pressure of 1.25 atm and volume of 20 L. Determine the temperature of the gas in Kelvins. Round your answer to the nearest tenth of K (e.g. if answer is 534.78, round it to 534.8). Take 1 atm = 101300 Pa and the ideal gas constant R = 8.31 J/mol K.