SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The temperature of the water will fall, causing it to freeze.
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More ice will form as the temperature of the water falls.
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The ice will melt as the temperature of the water rises.
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The ice will prevent the temperature of the water from changing.
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Detailed explanation-1: -The warm room continues to add energy to the cup, but all of that energy continues to go into melting the ice rather than raising the temperature. Once all the ice has melted, that energy can begin to increase the water’s temperature.
Detailed explanation-2: -Changing states of matter and energy When heat (a form of energy) is added, the ice melts into liquid water. It has reached its melting point – 0°C. Continue to apply heat, and the water will turn into water vapour, which is water in its gaseous state.
Detailed explanation-3: -When you add ice to hot water, some of the water’s heat melts the ice. The remaining heat warms the ice-cold water but cools the hot water in the process. You can calculate the mixture’s final temperature if you know how much hot water you started with, along with its temperature and how much ice you added.
Detailed explanation-4: -When the ice melts, it becomes 4kg of water, exactly equal to the 4kg previously displaced and at the same density, so the water level does not change.