A 706 mL gas sample at STP is compressed to a volume of 248 mL, and the temperature is increased to 39◦C. What is the new pressure of the gas in Pa?
Answer in units of Pa.
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2017-02-12 1:49 pm
回答 (1)
2017-02-12 9:43 pm
✔ 最佳答案
At STP: P₁ = 101000 Pa, V₁ = 706 mL, T₁ = 273 KNew conditions: P₂ = ? Pa, V₂ = 248 mL, T₂ = (273 + 39) K = 312 K
For a fixed amount of gas: P₁V₁/T₁ = P₂V₂/T₂
Then, P₂ = P₁ × (V₁/V₂) × (T₂/T₁)
New pressure, P₂ = (101000 Pa) × (706/248) × (312/273) = 329000 Pa (to 3 sig. fig.)
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