Lussac.Lyon

Gay Lussac's Law deals with the relationship between temperature and pressure. It states that if pressure increases, temperature will also increase.

As an equation, it would be written:

__P1__ = __P2__ T1    T2

For example, if you have a gas with a pressure of 4 atm, at 100° celsius, and then you increase the temperature to 200°, what will the pressure be? (assume the volume remains the same).

Your substituted example will look like this:

__4 atm__ = __x atm__ 100 °      200°

Like the previous equations, you must isolate the unknown unit, in this case, your unknown pressure. To do this, multiply each side be 200°. Now your equation should look like this:

__4 atm •200°__ = __x atm__ 100 °

This simplifies to become

__800°/atm__= 8 atm 100°

the degrees unit cancel out in the division, leaving you an answer of a pressure of 8 atm.



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