Question

State the pressure law and describe an experiment to verify it. Deduce the formula for the pressure coefficient of gas. What is this value?

Answer 1

The pressure law: At a constant volume, if the mass of the gas does not change, the pressure over temperature ratio is a constant value:

$$\frac{P_1}{T_1}=\frac{P_2}{T_2}=\text{const}.$$

Deduce the formula for the pressure coefficient of gas. Start with the ideal gas law:

$$PV=nRT,\\ P=\frac{nR}{V}\cdot T=kT,\\ k=\frac{nR}{V}.$$

The value depends on the volume of gas and the amount of the substance.