Ideal Vs. Real Gases

[ernest1284]

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I know a gas deviates from the ideal gas laws at high pressure and Low temperatures...... But when do you think the "best" conditions exist for an ideal gas???.......

- i would think low pressure and high temperature; but a gas would also deviate from the ideal gas once again as pressure at a given temperature approaches the condensation pressure.....

so basically my question is is there a set of conditions we can always feel safe to assume a gas behaves ideally???

thanks, ernie

 

[yorkiepoo]

I know a gas deviates from the ideal gas laws at high pressure and Low temperatures...... But when do you think the "best" conditions exist for an ideal gas???.......

- i would think low pressure and high temperature; but a gas would also deviate from the ideal gas once again as pressure at a given temperature approaches the condensation pressure.....

so basically my question is is there a set of conditions we can always feel safe to assume a gas behaves ideally???

thanks, ernie

not totally sure... but i think the answer is USUALLY

 

[slayerdeus]

I know a gas deviates from the ideal gas laws at high pressure and Low temperatures...... But when do you think the "best" conditions exist for an ideal gas???.......

- i would think low pressure and high temperature; but a gas would also deviate from the ideal gas once again as pressure at a given temperature approaches the condensation pressure.....

so basically my question is is there a set of conditions we can always feel safe to assume a gas behaves ideally???

thanks, ernie

The main thing you should be concerned with is the condition where there are NO intermolecular forces and volume is negligible. Also the molecules undergo perfectly elastic conditions. These approximations aren't true at low temperature and high pressure like you said.

At extremely high temperatures I think the real values deviates a bit from ideal values.

 

[thehipster]

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