Question

Describe evidence that supports boyles law, PV = constant for an isothermal process. describe difficulties for exploring this law

Describe evidence that supports gay-lussac's law, p/t = constant for an isovolumeteric process. describe difficulties exploring this law

Describe evidence that supoorts charle's law, v/t=constant for an isobaric process. describe difficulties exploring this law

Answer 1

for buyles law
PV = constnat for ideal gas behaviour at constant temperature
now, this happens when a process happens such that the gas has no change in internal energy
hence all the energy input is being used to do work ( 1st law of thermodynamics)
so, as there is no change in temeprature, and internal energy is constant
so when work is done by the gas, V increases, and to compensate for increase in V, P decreases

it is difficult to observe this in rela life as it is difficult to createa perfectly isothermal process

form guy lussac's law
for isovolumetric process ( like in a closed can), P/T = constant
so in a closed can, if we heat it, its temperature rises, and it pops after a while if heated too much as pressure rise is observed too
hence
P increases with increase in V indicating towards P/T = constant
while expoloring this law, as the pressure increases inside the canister, due to bulk modulus properties of the material, it changes its volume and the preocess no longer remians an isovolumetric process

from charle's law
for isobaric process
V/T = constant
now, consider a piston arrangement open to atmosphere
the pressure inside the cylinder is always constant
so as we heat the gas, the volume increases as piston comes up
in this case too, for the process to be isobaric, the piston has to move very slowly wihtout any acceleration which is difficult to achieve