Multiple Choice
At standard temperature and pressure (STP), what is the volume occupied by 1 mole of an ideal gas?
105
views
7. Gases
Standard Temperature and Pressure
Multiple Choice
Which of the following statements is true for ideal gases at standard temperature and pressure (STP)?
A
The pressure at STP is 2.00 atm.
B
One mole of an ideal gas occupies 22.4 L at STP.
C
The volume of one mole of an ideal gas at STP is 1.00 L.
D
The temperature at STP is 0 °C (273.15 K).
Verified step by step guidance1
Step 1: Understand the definition of STP (Standard Temperature and Pressure). STP is commonly defined as a temperature of 0 °C (273.15 K) and a pressure of 1 atm.
Step 2: Recall the ideal gas law equation: \(P V = n R T\), where \(P\) is pressure, \(V\) is volume, \(n\) is number of moles, \(R\) is the ideal gas constant, and \(T\) is temperature in Kelvin.
Step 3: Use the ideal gas law to find the volume occupied by one mole of an ideal gas at STP. Substitute \(P = 1\) atm, \(n = 1\) mole, \(T = 273.15\) K, and \(R = 0.0821\) L·atm/(mol·K) into the equation and solve for \(V\).
Step 4: Recognize that the calculated volume corresponds to approximately 22.4 L, which is the molar volume of an ideal gas at STP.
Step 5: Evaluate the given statements based on these facts: the pressure at STP is 1 atm (not 2 atm), the volume of one mole of ideal gas at STP is about 22.4 L (not 1.00 L), and the temperature at STP is 0 °C (273.15 K). Therefore, the true statement is that one mole of an ideal gas occupies 22.4 L at STP.
Related Videos
Related Practice
