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# Define STP for gases. A 5.0 mL sample of CH4 gas at 1 atm is enclosed in a gas tight syringe at 22 C. ?

If the syringe is immersed in an ice bath at STP, what is the new gas volume?

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- Roger the MoleLv 76 months agoFavorite Answer
Since 1982 the definition of STP has been 273.15 K and exactly 10^5 Pa.

(5.0 mL) x (100 kPa / 101.325 kPa) x (273.15 K / (273.15 + 22)K) = 4.5668 mL =

4.6 mL

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