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Question
When a hot liquid is mixed with a cold liquid, the temperature of the mixture ____________ .
Options
first decreases then becomes constant
first increases then becomes constant
continuously increases
is undefined for some time and then becomes nearly constant
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Solution
is undefined for some time and then becomes nearly constant
When hot liquid is mixed with cold liquid, the molecules collide and transfer heat. When heat is transferred, the temperature is undefined. Once the heat energy is shared by the molecules, the system reaches equilibrium and the temperature becomes nearly constant.
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