4. A mass of gas has a volume of 4 m3, a temperature of 290 K, and an absolute pressure of 475 kPa. When the gas is allowed to expand to 6.5 m3, its new temperature is 277 K. What's the absolute pressure of the gas after expansion? A. 279.2 kPa B. 178.5 kPa C. 293.9 kPa D. 104.1 kPa
s
Solution: n = PV/RT; n = (475000 Pa)(4m3) / (8.314 Pa-m3/mol-K)(290k); n = 788 moles; P = nRT/V; P = (788 moles)(8.314 Pa-m3/mol-K)(277K)/(6.5m3); P = 279,204 Pa or 279 kPa.
Question
Updated 77 days ago|8/15/2020 3:18:42 AM
Rating
8
Solution: n = PV/RT; n = (475000 Pa)(4m3) / (8.314 Pa-m3/mol-K)(290k); n = 788 moles; P = nRT/V; P = (788 moles)(8.314 Pa-m3/mol-K)(277K)/(6.5m3); P = 279,204 Pa or 279 kPa.
Added 77 days ago|8/15/2020 3:18:42 AM

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