Concept explainers
Minimum amount of ice needed to cool.
To identify: Whether it is better to cool the tea to room temperature before adding sugar or not.
Answer to Problem 74A
Yes, it is to cool the tea to room temperature before adding sugar.
Explanation of Solution
Given:
Volume of tea,
Initial temperature,
Final temperature,
Formula Used:
Specific heat formula,
Where,
Heat fusion formula,
Where,
Calculation:
The specific heat of water is
Heat of fusion of ice is
The density of water is around
Now,
The heat that must be lost by the tea is,
This heat is absorbed by ice as it melts. On putting the values in heat fusion equation,
The amount of ice needed is more than tea, which would result in diluted tea. So, it would be better to let cool at room temperature.
Conclusion:
Minimum amount of ice needed is
Yes, it is better to let cool the tea at room temperature before adding ice.
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