A fixed mass of an ideal gas is heated from 50 to 80 degrees C at a constant pressure of 1 atm. A second sample is heated from 50 to 80 degrees C at a constant pressure of 3 atm. For which case will the energy required be greater? The sample at 3 atm will require greater energy. They will require the same amount of energy because the specific heat of an ideal gas does not vary with pressure. It can not be determined. The sample at 1 atm will require greater energy. Question 3 (1 point) A sample of air is heated at constant pressure from 250 to 350 K. A second sample is heated at constant pressure from 450 to 550 K. Which case will require more energy? The sample heated from 450 to 550 K will need just a bit more energy. The sample heated from 250 to 350 K will need just a bit more energy. It can't be determined. They will need the same amount of energy because the specific heat of an ideal gas does not vary with temperature.