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  1. Explanation:

    The fact is that there exists no temperature change until a phase change is complete. That is to say, during a phase change, the energy that will be supplied is used only to separate the molecules. There is no part of it is used to increase the kinetic energy of the molecules. So its temperature will not rise, not really, since the kinetic energy of the molecules remains the same. Also, it should be noted that the average kinetic energy of the molecules does not change at the moment that melting occurs, thus the temperature of the molecules does not change.

  2. The temperature of the outer wall surface will be closer to the temperature of the surrounding air.


    Since the outer wall has a convective heat transfer coefficient that is 3 time the one in the inner surface due to the wind, the outer wall will have a temperature closer to the surrounding air's temperature because the heat that flows from the warmer inner room wall will be rapidly conducted away from the surface of the outer wall by the prevailing wind, leaving it with a reduced temperature that will be closer to the temperature of the surrounding air.

  3. 30 °C


    When you pour water from one glass to the other, the heat energy will flow from the hot water to the cold.

    You have equal masses of water in each glass. The hot water should cool down as much as the cold water warms up.

    The final temperature should be halfway between the starting temperatures in each glass.

    (10 °C + 50°C)/2 = 60 °C/2 = 30°C

    The temperature of the full glass of water should be 30 °C.

  4. The rate of temperature change does not stay constant and decreases over time because the temperature difference decreases over time.


    The temperature difference is due to Thermal Equilibrium

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