My name is Alexander FufaeV and here I write about:
Isobaric Thermodynamic Process: How to Describe it with Gay-Lussac's Law
Important Formula
$$\frac{\class{blue}{V_1}}{\class{blue}{T_1}} ~=~ \frac{\class{red}{V_2}}{\class{red}{T_2}}$$
$$\class{blue}{T_1} ~=~ \frac{\class{blue}{V_1}}{\class{red}{V_2}} \, \class{red}{T_2}$$
$$\class{red}{T_2} ~=~ \frac{\class{red}{V_2}}{\class{blue}{V_1}} \, \class{blue}{T_1}$$
$$\class{blue}{V_1} ~=~ \frac{\class{blue}{T_1}}{\class{red}{T_2}} \, \class{red}{V_2}$$
$$\class{red}{V_2} ~=~ \frac{\class{red}{T_2}}{\class{blue}{T_1}} \, \class{blue}{V_1}$$
What do the formula symbols mean?
Temperature before
$$ \class{blue}{T_1} $$ Unit $$ \mathrm{K} $$
Absolute temperature of the ideal gas before the isobaric process.
Note: The temperature in degrees Celsius must be converted to Kelvin unit!
Temperature after
$$ \class{red}{T_2} $$ Unit $$ \mathrm{K} $$
Absolute temperature of the ideal gas after the isobaric process.
Volume before
$$ \class{blue}{V_1} $$ Unit $$ \mathrm{m}^3 $$
Volume of the ideal gas before the isobaric process. Isobaric means that the pressure of the gas has remained constant during the process.
Volume after
$$ \class{red}{V_2} $$ Unit $$ \mathrm{m}^3 $$
Volume of the ideal gas after the isobaric process.
Gay-Lussac's law describes the relationship between the temperature and the volume of a gas at constant pressure:
$$ \begin{align} \frac{\class{blue}{V_1}}{\class{blue}{T_1}} ~=~ \frac{\class{red}{V_2}}{\class{red}{T_2}} \end{align} $$