2. Water at the Antarctica usually exits as ice, making it very difficult to use the water or conduct experiment requiring the water

Question

2. Water at the Antarctica usually exits as ice, making it very difficult to use the water or conduct experiment requiring the water to be in liquid state. A coffee addicted physicist stationed at a research base requires about 0.8 kg of ice for his coffee on the hour.
a. How much heat is required to convert 0.8 kg of ice at —35 °C into steam at 100°C?

in progress 0
Diễm Thu 4 years 2021-09-04T09:48:23+00:00 2 Answers 4 views 0

Answers ( )

  1. thnahdat
    0
    2021-09-04T09:49:31+00:00
    Reply

    Answer:

    662480 J

    Explanation:

    The heat required to convert 0.8Kg of ice at -35°c to steam at 100°c is the sum of the heat required to raise the temperature of the ice from -35°c to 0°C, the latent heat of fusion of ice and the heat required to raise the temperature of the ice from 0°c to 100°c.

    Latent heat of fusion for ice= 3.36× 10^5 J Kg-1

    Specific heat capacity of ice= 2060 J kg−1K−1

    Specific heat capacity of water= 4200 JKg-1K-1

    Heat required to raise the temperature of the ice to fusion point

    H= 0.8 × 2060 × [0-(-35)]

    H= 57680 J

    Latent heat of fusion of ice;

    H= mL

    H= 0.8 ×3.36× 10^5

    H= 2.688×10^5 J

    Heat required to raise the temperature of the water to 100°C

    Since mass is conserved, the mass of ice that has melted has been turned into an equivalent mass of water.

    Therefore mass of water formed= 0.8Kg

    H= 0.8× 4200 × 100

    H= 336000J

    Therefore total heat required;

    H= 57680 + 2.688×10^5 + 336000

    H= 662480 J

  2. Tryphena
    0
    2021-09-04T09:50:18+00:00
    Reply

    Answer:

    2468,080j

    Explanation:

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )