Final answer:
If the volume of a sample is quadrupled while all other factors are held constant, the Kelvin temperature remains constant and the pressure decreases to half its original value.
Step-by-step explanation:
If the volume of a sample is quadrupled while all other factors are held constant, the Kelvin temperature and the pressure will be affected as follows:
- The Kelvin temperature remains constant because no energy is added or removed from the system.
- The pressure will decrease to half its original value. This is because, according to the ideal gas law, when the volume is quadrupled and the temperature is constant, the pressure is inversely proportional to the volume.