A sample of argon gas occupies a volume of 8.81 L at 69 °C and 0.4940 atm. If the volume of the gas sample is decreased to 7440.0 mL, whil?

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2017-11-07 9:00 pm

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A sample of argon gas occupies a volume of 8.81 L at 69 °C and 0.4940 atm. If the volume of the gas sample is decreased to 7440.0 mL, while its temperature is increased to 126 °C, the resulting gas pressure, in torr, will be torr.

回答 (1)

wanszeto

2017-11-07 10:49 pm

Initial : P₁ = 0.4940 × 760 torr, V₁ = 8.81 × 1000 mL = 8810 mL, T₁ = (273 + 69) K = 342 K
Final : P₂ = ? torr, V₂ = 7440.0 mL, T₂ = (273 + 126) K = 399 K

Combined gas law : P₁V₁/T₁ = P₂V₂/T₂
Then, P₂ = P₁ × (V₁/V₂) × (T₂/T₁)

Resulting gas pressure, P₂ = (0.4940 × 760 torr) × (8810/7440.0) × (399/342) = 519 torr

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