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Which quantity is held constant for Boyle's law, Gay-Lussac's law, and Charles's law?

• volume
•mass
• temperature
•pressure

User Shubham Chaurasia
by
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1 Answer

8 votes
8 votes

Answer:

pressure

Why is pressure constant in Charles’s Law?

We build a "ideal experiment" with only one independent variable changing. So Charles Law is intended to investigate the influence of V (dependent variable) and temperature T (independent variable), while holding everything else constant, particularly pressure P. We may alternatively consider temperature T as a dependent variable and V as an independent variable (like when you compress a gas, and see what is the change of temperature, although it is very difficult to practically compress a gas while keeping the pressure constant).

If everything is kept at 1 atm, it is simple to keep pressure constant in the lab. That is, in the absence of any hard-wall containers, we may reasonably infer that the pressure is constant.

Other rules were created to investigate processes with V constant (isometric), T constant (isothermal), and adiabatic (Q = 0). Of course, the majority of them eventually unite to form a single ideal gas law.

Thanks,

Eddie

User Rafael Borja
by
3.3k points
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