To 2.00 moles of nitrogen gas at 25.0 °C, confined within a cylinder by a piston maintaining a constant pressure of 1.00 atm, 6.70 kJ of energy is added. Assume this energy is used to do work of expansion of the gas at 1.00 atm. What will be the final temperature (in °C) of the gas?

A. 30.0 °C

B. 45.0 °C

C. 60.0 °C

D. 75.0 °C