Question

A gas occupies a volume of 2.00 L at 860 mmHg and 30.0°C. Which of the following mathematical expressions will yield its volume at STP?

a. 2.00 LX 760 mm Hg / 860 mm Hg x 273 K / 303 K
b. 2.00 LX 760 mm Hg / 860 mm Hg x 298 K / 303 K
c. 2.00 LX 860 mm Hg / 760 mm Hg x 303 K / 273 K
d. 2.00 LX 860 mm Hg / 760 mm Hg x 273 K / 303 K
e. 2.00 LX 760 mm Hg / 860 mm Hg x 303 K / 273 K

Answer 1

b. 2.00 LX 760 mm Hg / 860 mm Hg x 298 K / 303 K The correct expression to calculate the volume of a gas at STP is option b. It uses the combined gas law and considers the initial conditions of the gas. Pressure,

Step-by-step explanation:

The correct expression that will yield the volume of a gas at STP is option b. 2.00 LX 760 mm Hg / 860 mm Hg x 298 K / 303 K.

The given expression uses the combined gas law, which relates the initial and final conditions of a gas sample. In this case, we are looking to find the volume at STP, which is defined as 0°C (273 K) and 1 atm (760 mm Hg).

By using the combined gas law equation, we can manipulate the equation to solve for V₂, the final volume at STP.

It is important to note that for the combined gas law, the pressure is directly proportional to the volume and the temperature is inversely proportional to the volume.

This means that as the pressure increases, the volume decreases, and as the temperature increases, the volume also increases.