The pressure calculated by the standard equation of state is strong. Due to the intermolecular attraction in Van Gogh gas, the actual pressure will be smaller than that without gravity. A/VM 2 in the correction term of van der Waals equation to ideal gas equation is called internal pressure, which indicates the actual pressure reduction caused by intermolecular attraction. Advanced mathematics is needed to further understand the microscopic process. ?

Reply to the message of the landlord hi: you may have miscalculated, or the topic itself is wrong. The landlord can refer to the solution of a typical example. Refer to the attached drawings