The weight of the mass added to the hanger is equal to the extra force on the gas, but what area should we use to calculate the added pressure from this mass?

With some of the experimental details out of the way, let's think a bit about what we expect to see in our data if the ideal gas law is a good model for our gas. We would like to verify the ideal gas law PV = nRT

Question

Physics

Karla Rowland

6 January, 12:22

The weight of the mass added to the hanger is equal to the extra force on the gas, but what area should we use to calculate the added pressure from this mass?

With some of the experimental details out of the way, let's think a bit about what we expect to see in our data if the ideal gas law is a good model for our gas. We would like to verify the ideal gas law PV = nRT

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Answers (1)

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Bridget Stevens · Answer 1

Answer: according to the Avagadro's law, volume is directly propotional to no of moles: VXn

according to the Charles law, volume is directly propotional to temperatue: VXT

according to the Boyle's law, volume is inversely propotional to P: VX1/P

when we combine them we get:

VXnT1/P

V=knT/P

k = R (universal gas constant)

V=RnT/P

PV=nRT