Gas Laws Formulas and Relationships for Chemistry Students

Boyle's Law

$P_1V_1 = P_2V_2$

Charles's Law

$\frac{V_1}{T_1} = \frac{V_2}{T_2}$

Gay-Lussac's Law

$\frac{P_1}{T_1} = \frac{P_2}{T_2}$

Avogadro's Law

$\frac{V_1}{n_1} = \frac{V_2}{n_2}$

Combined Gas Law

$\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}$

Ideal Gas Law (The Master Formula)

$PV = nRT$

Ideal Gas Constant ($R$)

$R = 0.0821 \frac{\text{L}\cdot\text{atm}}{\text{mol}\cdot\text{K}}$

Temperature Conversion

$K = ^\circ C + 273.15$

STP Volume (Molar Volume)

$22.4 \text{ L}$

Dalton's Law (Total Pressure)

$P_{\text{total}} = P_A + P_B + P_C + \dots$

Partial Pressure

$P_A = \chi_A P_{\text{total}}$

Mole Fraction

$\chi_A = \frac{n_A}{n_{\text{total}}}$

Gas Density

$D = \frac{PM}{RT}$