(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

a) An ideal gas has a pressure of 1atm, volume of 0.5m^3m temperature of 300k. Find the number of moles.

b) Three moles of an ideal gas is at a pressure of 1x10^2 Nm^-2 and a temperature of 263K. Calculate the volume.

2. Relevant equations

1) PV = NRT

2) PV=NKbT

R = gas constant; Kb = Boltzman's constant

3. The attempt at a solution

I have found the answers to be a) 1.22x10^23moles and b) 65.6m^3.

What I don't understand, is when to use which equation. Why can I not use equation 1) for question a) vice versa.

Thanks.

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# Homework Help: Ideal gas theory

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