A gas is collected at 20.0 °C and 725.0 mm Hg. When the temperature is changed to 0 °C, what is the resulting pressure?

Question

A gas is collected at 20.0 °C and 725.0 mm Hg. When the temperature is
changed to 0 °C, what is the resulting pressure?

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Hưng Khoa 1 year 2021-08-31T01:18:14+00:00 1 Answers 21 views 0

Answers ( )

    0
    2021-08-31T01:19:57+00:00

    Answer:

    676mmHg

    Explanation:

    Using the formula;

    P1/T1 = P2/T2

    Where;

    P1 = initial pressure (mmHg)

    P2 = final pressure (mmHg)

    T1 = initial temperature (K)

    T2 = final temperature (K)

    According to the information provided in this question;

    P1 = 725.0mmHg

    P2 = ?

    T1 = 20°C = 20 + 273 = 293K

    T2 = 0°C = 0 + 273 = 273K

    Using P1/T1 = P2/T2

    725/293 = P2/273

    Cross multiply

    725 × 273 = 293 × P2

    197925 = 293P2

    P2 = 197925 ÷ 293

    P2 = 676mmHg.

    The resulting pressure is 676mmHg

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