Calculating Pressure Using the Ideal Gas Law

Oct 13, 2025 by wbrum.org 41 views

Introduction

The ideal gas law is a fundamental concept in chemistry that relates the pressure, volume, and temperature of a gas. It is expressed by the equation PV = nRT, where P is the pressure of the gas, V is the volume of the gas, n is the number of moles of the gas, R is the gas constant, and T is the temperature of the gas in Kelvin. In this article, we will use the ideal gas law to calculate the pressure of a sample of gas in a 500.0 mL flask at a temperature of 265°C.

The Ideal Gas Law

The ideal gas law is a mathematical equation that describes the behavior of an ideal gas. It is expressed by the equation PV = nRT, where:

P is the pressure of the gas in pascals (Pa)
V is the volume of the gas in liters (L)
n is the number of moles of the gas
R is the gas constant, which is equal to 8.3145 L·kPa/mol·K
T is the temperature of the gas in Kelvin (K)

Given Values

We are given the following values:

n = 6.25 × 10^−3 mol
V = 500.0 mL = 0.5 L
T = 265°C = 538 K

Converting Units

Before we can use the ideal gas law to calculate the pressure of the gas, we need to convert the given values to the correct units. The volume of the gas is already given in liters, so we don't need to convert it. However, we need to convert the temperature from Celsius to Kelvin.

To convert the temperature from Celsius to Kelvin, we can use the following equation:

T (K) = T (°C) + 273.15

Plugging in the given value, we get:

T (K) = 265°C + 273.15 = 538 K

Calculating Pressure

Now that we have the given values in the correct units, we can use the ideal gas law to calculate the pressure of the gas. Plugging in the values, we get:

P = nRT / V

Substituting the given values, we get:

P = (6.25 × 10^−3 mol) × (8.3145 L·kPa/mol·K) × (538 K) / (0.5 L)

Simplifying the equation, we get:

P = 17.31 kPa

Conclusion

In this article, we used the ideal gas law to calculate the pressure of a sample of gas in a 500.0 mL flask at a temperature of 265°C. We converted the given values to the correct units and plugged them into the ideal gas law equation to get the pressure of the gas. The calculated pressure is 17.31 kPa.

References

Atkins, P. W., & de Paula, J. (2010). Physical chemistry (9th ed.). Oxford University Press.
Chang, R. (2010). Physical chemistry for the life sciences. Cambridge University Press.

Discussion

The ideal gas law is a fundamental concept in chemistry that relates the pressure, volume, and temperature of a gas. It is expressed by the equation PV = nRT, where P is the pressure of the gas, V is the volume of the gas, n is the number of moles of the gas, R is the gas constant, and T is the temperature of the gas in Kelvin. In this article, we used the ideal gas law to calculate the pressure of a sample of gas in a 500.0 mL flask at a temperature of 265°C.

The ideal gas law is a mathematical equation that describes the behavior of an ideal gas. It is expressed by the equation PV = nRT, where:

P is the pressure of the gas in pascals (Pa)
V is the volume of the gas in liters (L)
n is the number of moles of the gas
R is the gas constant, which is equal to 8.3145 L·kPa/mol·K
T is the temperature of the gas in Kelvin (K)

The ideal gas law is a useful tool for calculating the pressure of a gas in a variety of situations. It is commonly used in chemistry and physics to calculate the pressure of a gas in a container, as well as to calculate the volume of a gas at a given pressure and temperature.

The ideal gas law is a fundamental concept in chemistry that relates the pressure, volume, and temperature of a gas. It is expressed by the equation PV = nRT, where P is the pressure of the gas, V is the volume of the gas, n is the number of moles of the gas, R is the gas constant, and T is the temperature of the gas in Kelvin. In this article, we used the ideal gas law to calculate the pressure of a sample of gas in a 500.0 mL flask at a temperature of 265°C.

Calculating Pressure Using the Ideal Gas Law

The ideal gas law is a mathematical equation that describes the behavior of an ideal gas. It is expressed by the equation PV = nRT, where:

P is the pressure of the gas in pascals (Pa)
V is the volume of the gas in liters (L)
n is the number of moles of the gas
R is the gas constant, which is equal to 8.3145 L·kPa/mol·K
T is the temperature of the gas in Kelvin (K)

To calculate the pressure of a gas using the ideal gas law, we need to plug in the given values into the equation. The given values are:

n = 6.25 × 10^−3 mol
V = 500.0 mL = 0.5 L
T = 265°C = 538 K

Plugging in the values, we get:

P = nRT / V

Substituting the given values, we get:

P = (6.25 × 10^−3 mol) × (8.3145 L·kPa/mol·K) × (538 K) / (0.5 L)

Simplifying the equation, we get:

P = 17.31 kPa

Conclusion

References

Atkins, P. W., & de Paula, J. (2010). Physical chemistry (9th ed.). Oxford University Press.
Chang, R. (2010). Physical chemistry for the life sciences. Cambridge University Press.

Discussion

The ideal gas law is a fundamental concept in chemistry that relates the pressure, volume, and temperature of a gas. It is expressed by the equation PV = nRT, where P is the pressure of the gas, V is the volume of the gas, n is the number of moles of the gas, R is the gas constant, and T is the temperature of the gas in Kelvin. In this article, we used the ideal gas law to calculate the pressure of a sample of gas in a 500.0 mL flask at a temperature of 265°C.

The ideal gas law is a mathematical equation that describes the behavior of an ideal gas. It is expressed by the equation PV = nRT, where:

P is the pressure of the gas in pascals (Pa)
V is the volume of the gas in liters (L)
n is the number of moles of the gas
R is the gas constant, which is equal to 8.3145 L·kPa/mol·K
T is the temperature of the gas in Kelvin (K)

Calculating Pressure Using the Ideal Gas Law

The ideal gas law is a mathematical equation that describes the behavior of an ideal gas. It is expressed by the equation PV = nRT, where:

P is the pressure of the gas in pascals (Pa)
V is the volume of the gas in liters (L)
n is the number of moles of the gas
R is the gas constant, which is equal to 8.3145 L·kPa/mol·K
T is the temperature of the gas in Kelvin (K)

Q&A: Calculating Pressure Using the Ideal Gas Law

Q: What is the ideal gas law?

A: The ideal gas law is a mathematical equation that describes the behavior of an ideal gas. It is expressed by the equation PV = nRT, where P is the pressure of the gas, V is the volume of the gas, n is the number of moles of the gas, R is the gas constant, and T is the temperature of the gas in Kelvin.

Q: What is the gas constant (R)?

A: The gas constant (R) is a constant that is used in the ideal gas law equation. It is equal to 8.3145 L·kPa/mol·K.

Q: How do I calculate the pressure of a gas using the ideal gas law?

A: To calculate the pressure of a gas using the ideal gas law, you need to plug in the given values into the equation. The given values are:

n = number of moles of the gas
V = volume of the gas in liters
T = temperature of the gas in Kelvin
R = gas constant (8.3145 L·kPa/mol·K)

The equation is: P = nRT / V

Q: What is the unit of pressure in the ideal gas law?

A: The unit of pressure in the ideal gas law is pascals (Pa).

Q: Can I use the ideal gas law to calculate the volume of a gas?

A: Yes, you can use the ideal gas law to calculate the volume of a gas. To do this, you need to rearrange the equation to solve for V. The equation is: V = nRT / P

Q: What are some common applications of the ideal gas law?

A: The ideal gas law is commonly used in chemistry and physics to calculate the pressure of a gas in a container, as well as to calculate the volume of a gas at a given pressure and temperature. It is also used to calculate the number of moles of a gas in a container.

Q: What are some common mistakes to avoid when using the ideal gas law?

A: Some common mistakes to avoid when using the ideal gas law include:

Using the wrong units for the given values
Forgetting to convert the temperature from Celsius to Kelvin
Not plugging in the correct values into the equation
Not checking the units of the answer

Q: Can I use the ideal gas law to calculate the pressure of a gas in a real-world scenario?

A: Yes, you can use the ideal gas law to calculate the pressure of a gas in a real-world scenario. However, you need to make sure that the gas is behaving ideally, which means that it is not interacting with other molecules or the container walls.

Conclusion

In this article, we have discussed the ideal gas law and how to use it to calculate the pressure of a gas. We have also answered some common questions about the ideal gas law and provided some tips for avoiding common mistakes. We hope that this article has been helpful in understanding the ideal gas law and how to use it in real-world scenarios.

References

Atkins, P. W., & de Paula, J. (2010). Physical chemistry (9th ed.). Oxford University Press.
Chang, R. (2010). Physical chemistry for the life sciences. Cambridge University Press.

Discussion

The ideal gas law is a fundamental concept in chemistry and physics that relates the pressure, volume, and temperature of a gas. It is expressed by the equation PV = nRT, where P is the pressure of the gas, V is the volume of the gas, n is the number of moles of the gas, R is the gas constant, and T is the temperature of the gas in Kelvin.

Calculating Pressure Using the Ideal Gas Law

The ideal gas law is a mathematical equation that describes the behavior of an ideal gas. It is expressed by the equation PV = nRT, where:

P is the pressure of the gas in pascals (Pa)
V is the volume of the gas in liters (L)
n is the number of moles of the gas
R is the gas constant, which is equal to 8.3145 L·kPa/mol·K
T is the temperature of the gas in Kelvin (K)

To calculate the pressure of a gas using the ideal gas law, you need to plug in the given values into the equation. The given values are:

n = number of moles of the gas
V = volume of the gas in liters
T = temperature of the gas in Kelvin
R = gas constant (8.3145 L·kPa/mol·K)

The equation is: P = nRT / V