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A gas has a pressure of 5.7ATM at 100.0 C what is the pressure at 20.0 C? (assume voulme is unchanged)

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200 C = 373 K
20 C = 293 K

P1 / T1 = P2 / T2
or
P2 = P1 T2/T1
= 5.7 (293/373)

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