For a real gas obeying van der Waals' equation, a graph is plotted between PVm (y-axis) and P(x-axis) where Vm is the molar volume. Find the y-intercept of the graph.
Correct answer: A. RT
- A. RT
- B. a/Vm
- C. b
- D. Cannot be determined
Explanation
For a real gas obeying van der Waal's equation, a graph is plotted between PVm (y-axis) and P (x-axis), where Vm is molar volume. The y-intercept of the graph is RT. This means that when the pressure of the gas is zero, the molar volume of the gas is equal to RT/P, where R is the gas constant and T is the temperature in Kelvin.
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