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2. Relevant equations

3. The attempt at a solution

I'm currently studying A2 physics and I'm stumped on a particular question within a past paper involving internal energy of air. The question is as follows:

Estimate the internal energy of the air in a room of volume 24m^3 at a temperature of about 20˚C. Assume that the air behaves as an ideal gas at atmospheric pressure. Here are some useful formulae and data.There are several ways to make this estimate. You do NOT need to use all of the information.

pV=nRT is the equation of state ofnmoles of an ideal gas

kinetic energy ofnmoles of an ideal gas = 3/2 nRT

data:

R = 8.31 J mol^-1 K^-1

density of air = 1.3 kg m^-3

molar mass of air = 0.030 kg mol^-1

atmospheric pressure = 1.0x10^5 Pa

Internal Energy = .......................................J

Any Ideas, Regards Tom

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# Internal Energy of air

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