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14 July, 11:35

A fixed amount of ideal gas is held in a rigid container that expands negligibly when heated. At 20°C the gas pressure is P. If we add enough heat to increase the temperature from 20°C to 40°C, the pressure will be:

A. equal to 2P

B. less than 2P

C. impossible to determine since we do not know the number of moles of gas in the container

D. greater than 2P

or

E. impossible to determine since we do not know the volume of gas in the container.

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Answers (1)
  1. 14 July, 11:56
    0
    Gay-Lussac's law states:

    P/T = constant

    P₁/T₁ = P₂/T₂; T₂ = 2T₁

    P₂ = P₁2T₁ / T₁

    P₂ = 2P₁

    The answer is A.
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