A fixed mass of gas at 2 atm and 300 K is heated to 600 K at constant volume. The new pressure is
- A. 1 atm
- B. 2 atm
- C. 4 atm
- D. 8 atm
Explanation
Pressure is proportional to absolute temperature at constant volume, so doubling the temperature in kelvin doubles the pressure to 4 atm. Both temperatures are already absolute here, which removes the usual conversion trap. This is why pressurised cylinders carry warnings about heat.
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