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Which TWO are TRUE of Gay-Lussac's law?

As temperature increases, volume increases.

As temperature increases, volume decreases.

As pressure increases, temperature increases.

As pressure decreases, temperature decreases.

1 answer

The two statements that are true of Gay-Lussac's law are:

  1. As pressure increases, temperature increases.
  2. As pressure decreases, temperature decreases.

Gay-Lussac's law states that the pressure of a fixed amount of gas is directly proportional to its temperature (in Kelvin) when the volume is held constant. Thus, if the pressure increases, the temperature must also increase, and vice versa.

The other two statements regarding volume and temperature are actually related to Charles's law, not Gay-Lussac's law.