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8 June, 07:47

A sample of nitrogen gas, (N2), occupies 45.0 mL at 27.00∘C and 80.0 kPa. What will be the pressure if the gas is cooled to - 73.00∘C at constant volume?

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  1. 8 June, 08:12
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    The new pressure is 53.3 kPa

    Explanation:

    This problem can be solved by this law. when the volume remains constant, pressure changes directly proportional as the Aboslute T° is modified.

    T° increase → Pressure increase

    T° decrease → Pressure decrease

    In this case, temperature was really decreased. So the pressure must be lower.

    P₁ / T₁ = P₂ / T₂

    80 kPa / 300K = P₂/200K

    (80 kPa / 300K). 200 K = P₂ → 53.3 kPa
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