Arigid tank contains 3.52 kg of an ideal gas. the volume of the tank is v1 = 1.20 m^3 and initially the gas is at a pressure of p1 = 225 kpa. the tank is charged by adding 0.74 kg of the same gas at which point the new pressure is 450 kpa and the new temperature is 153.94 °c. determine the gas constant, r, a possible identity of the gas, the original temperature, t1, the original density, rho1, and the original specific volume, v1. lastly, express the final temperature in each of the other common temperature units: °f, k, and r.