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12 July, 04:03

A 1.0-mol sample of hydrogen gas has a temperature of 27◦C. (a) What is the total kinetic energy of all the gas molecules in the sample? (b) How fast would a 65-kg person have to run to have the same kinetic energy?

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  1. 12 July, 04:06
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    (a) K. E. = 3,741.512‬ J, (b) v = v = 10.73 m/s

    Explanation:

    a) Ideal Gas Formula in term of K. E.

    K. E. = 3/2 n R T = 3/2 n R T (R is universal gas constant = 8.314472 J/mol

    K. E. = (3/2) * 1.0 mol * 8.314472J/mol * 300 K (t = 27° C = 300 K)

    K. E. = 3,741.512‬ J

    b) K. E. = 1 / 2 m v²

    ⇒ v = spuare root (2 K. E. / m)

    v = square root (2 * 3,741.512‬ K / 65 kg)

    v = 10.73 m/s
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