A gas is heated from 298 cap k to 367 cap k while its volume changes from 2 point 5 liters to 3 point 9 liters If the initial pressure of the gas is 1 point 1 atm , what is the final pressure of the gas?

Use the combined gas law: P₁V₁/T₁ = P₂V₂/T₂. Solving for the final pressure gives P₂ = (1.1 atm)(2.5 L)(367 K) / [(298 K)(3.9 L)] ≈ 0.87 atm. Therefore, the final pressure is 0.87 atm, choice C.

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