The ideal gas equation is needed here. Since PV=nRT, we see that the volume is directly proportional to the temperature. We must, however use Kelvin temperatures in this equation. Since you want the volume tripled, you have to triple the temperature.initial temp is 273 K final temp should be 819 K819 K - 273 K = 546 degrees CRemember to get the Kelvin temperature one adds 273 to the Celsius number