A sample of nitrogen gas is collected over water at a temperature of 23 degrees C. What is the pressure of the nitrogen gas if the atmospheric pressure is 795 mm HG?

Anser in units of mm Hg.

To determine the pressure of the nitrogen gas, we need to consider the vapor pressure of water at the given temperature and subtract it from the atmospheric pressure.

Here's how to calculate it step by step:

Step 1: Find the vapor pressure of water at 23 degrees Celsius.
You can look up the vapor pressure of water in a table or use a mathematical equation like the Antoine equation. For simplicity, let's use a table.

At 23 degrees Celsius, the vapor pressure of water is approximately 21.06 mmHg.

Step 2: Calculate the pressure of the nitrogen gas.
To find the pressure of the nitrogen gas, we subtract the vapor pressure of water from the atmospheric pressure.

Pressure of nitrogen gas = Atmospheric pressure - Vapor pressure of water
= 795 mmHg - 21.06 mmHg
= 773.94 mmHg

Therefore, the pressure of the nitrogen gas is approximately 773.94 mmHg.

To find the pressure of the nitrogen gas, we need to consider the partial pressure of the gas and the vapor pressure of water at the given temperature.

1. Convert the temperature to Kelvin:
T(K) = 23°C + 273.15 = 296.15 K

2. Determine the vapor pressure of water at the given temperature:
According to the Antoine equation, the vapor pressure of water at 23°C is 21.01 mmHg.

3. Subtract the vapor pressure of water from the atmospheric pressure to obtain the partial pressure of the nitrogen gas:
Partial Pressure of Nitrogen Gas = Atmospheric Pressure - Vapor Pressure of Water
Partial Pressure of Nitrogen Gas = 795 mmHg - 21.01 mmHg = 773.99 mmHg

Therefore, the pressure of the nitrogen gas collected over water at a temperature of 23 degrees Celsius is approximately 773.99 mmHg.