What is the change in energy of a gas at a pressure of 105 kPa, if 245 J of energy is added causing a change in volume from 25.3 L to 38.6 L

Question

What is the change in energy of a gas at a pressure of 105 kPa, if 245 J of energy is added causing a change in volume from 25.3 L to 38.6 L?

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Thái Dương 4 years 2021-08-11T07:12:01+00:00 1 Answers 15 views 0

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  1. thienthi
    0
    2021-08-11T07:13:21+00:00
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    Answer:

    -1151.5 J

    Explanation:

    Given that:

    The supplies energy = 245 L

    The energy used in the expansion of gas = Pressure ×ΔV (change in volume)

    At standard conditions;

    Pressure = 105 × 10³ Pa

    energy used in the expansion = 105 × 10³ Pa × (38.6 – 25.3)L

    = 1396.5 J

    Thus, the change in the energy of gas = 245 – 1396.5 J

    = -1151.5 J

    Hence, we can conclude that the gas has lost its own energy in the process of expansion.

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