How Does Pressure Change with Volume in an Isothermal Process?

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In an isothermal process, the pressure of a gas is inversely proportional to its volume, as described by the equation pV = constant. Given an initial volume of 20 cm³ and pressure of 2 x 10^5 Pa, when the volume changes to 27 cm³, the new pressure can be calculated using the relationship p1 * V1 = p2 * V2. The temperature must be converted to Kelvin for accurate calculations, but it is not necessary for determining the pressure change. The key takeaway is that as volume increases, pressure decreases in an isothermal process.
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Homework Statement



Gas temperature 30C, volume 20cm3 and pressure 2*10^5. We have isothermal change and volume goes to 27cm3, what's the change of pressure?

Homework Equations



pV=nRT

The Attempt at a Solution



(20*10^-6*2*10^5)/30 and then we get constant. p1*V1=const -> p1=const/V1
 
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Note that the temperature must be in units of K i.e.(30 + 273).
 
But one does not need the value of temperature. Just use PV = constant.
 

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