What is one volume of CO2 in grams per liter?

To determine the weight of one volume of CO2 in grams per liter, it is important to understand how gas volumes translate into weight. CO2 has a specific density at standard temperature and pressure (STP) which can be used for conversion.

One mole of any gas occupies approximately 22.4 liters at STP. The molecular weight of CO2 is approximately 44 grams per mole. Therefore, to find the weight of one volume, you take the weight of one mole (44 grams) and divide it by the volume it occupies at STP (22.4 liters):

44 g/mol ÷ 22.4 L/mol ≈ 1.96 g/L.

This calculation reveals that one volume of CO2 corresponds to about 1.96 grams per liter, making it the correct choice. Understanding this calculation is crucial for applications in brewing and fermentation processes, where the management of carbonation levels and gas measurements is essential.