Ask Question
7 November, 12:06

5.00 kg of liquid water is heated to 100.0 °C in a closed system. At this temperature, the density of liquid water is 958 kg/m3. The pressure is maintained at atmospheric pressure of 1.01 x 105 Pa. A moveable piston of negligible weight rests on the surface of the water. The water is then converted to steam by adding an additional amount of heat to the system. When all of the water is converted, the final volume of the steam is 8.50 m3. The latent heat of vaporization of water is 2.26 x 106 J/kg. Calculate how much work is done and the change in the internal energy during this isothermal process.

+4
Answers (1)
  1. 7 November, 12:20
    0
    1.04 x 107 J.

    Explanation:

    We can use the following method to do the calculation

    Total energy given to water to convert intosteam

    dQ = m * l

    dQ = 5.00 * 2.26 * 106

    = 1.13 * 107 J

    Work done at constantpressure dW = P * dV

    Initialvolume V1 = 5.00kg / 958

    = 5.22 * 10-3 m3

    Finalvolume = 8.50 m3

    => dW = 1.01 * 105 * (8.50 - 5.22 * 10-3)

    = 8.58 * 105 J

    First law of thermodynamicsis dQ = ΔU + dW

    Change in internalenergy ΔU = 1.13 * 107 - 8.58 * 105

    = 1.04 x 107 J as our answer
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “5.00 kg of liquid water is heated to 100.0 °C in a closed system. At this temperature, the density of liquid water is 958 kg/m3. The ...” in 📗 Physics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers