Which of the following is the correct expression for the van der Waals equation?
Practice Questions
Q1
Which of the following is the correct expression for the van der Waals equation?
(P + a(n/V)^2)(V - nb) = nRT
(P - a(n/V)^2)(V + nb) = nRT
PV = nRT + a(n/V)^2
PV = nRT - nb
Questions & Step-by-Step Solutions
Which of the following is the correct expression for the van der Waals equation?
Step 1: Understand that the van der Waals equation is used to describe the behavior of real gases.
Step 2: Recognize that the equation accounts for the volume occupied by gas molecules and the attractive forces between them.
Step 3: Identify the variables in the equation: P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is temperature.
Step 4: Note that 'a' and 'b' are constants specific to each gas: 'a' corrects for attractive forces, and 'b' corrects for the volume occupied by gas molecules.
Step 5: Write down the van der Waals equation: (P + a(n/V)^2)(V - nb) = nRT.
