# Oxygen and carbon dioxide are found under the same conditions and at the same temperature.

August 24, 2021 | education

| **Oxygen and carbon dioxide are found under the same conditions and at the same temperature. Are the pressures of these gases the same?**

For gas, the ideal gas equation is valid: P * V = m * R * T / M, where P is the gas pressure, V is the gas volume, m is the gas mass, R is the universal gas constant, T is the absolute temperature, M is the molar mass …

P = m * R * T / M * V.

Since the conditions are the same, the values of m, R, T, V will be the same for two gases. Only the molar mass will be different.

M (O2) = 16 * 2 = 32 g / mol is the molar mass of oxygen.

M (CO2) = 12 + 16 * 2 = 44 g / mol is the molar mass of carbon dioxide.

Therefore, the oxygen pressure will be greater than the carbon dioxide pressure under the same conditions.