
Concept explainers
How much ice should be added to the glass of tea to cool it to a temperature of

Answer to Problem 41P
The mass of ice need to be added is
Explanation of Solution
The temperature of the ice is
Since the container is insulated, the change in internal energy of the tea-ice system is zero.
Write the equation for the first law of
Here,
The temperature of the tea changes from
Write the equation for the heat change of the tea.
Here,
The temperature of the ice first changes from
Write the equation for the heat change of the ice.
Here,
Substitute equation (II) and (III) in equation (I).
Re-write the above equation to get an expression for
Conclusion:
Substitute
The mass of ice need to be added is
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Chapter 14 Solutions
Physics
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