To cool your 250 mL of coffee at 90°C, you put a 100 g metal spoon in a glass of ice water to lower its temperature to 0°C, and then you put the spoon in the coffee. After thermal equilibrium has been reached, what is the final temperature of your coffee? Assume energy is exchanged only between the spoon and the coffee. The heat capacity of the metal spoon is 80 J/°C. Assume the specific heat and density of coffee is the same as that of water, 4.18 J/(g · °C) and 1.00 g/mL.
To cool your 250 mL of coffee at 90°C, you put a 100 g metal spoon in a glass of ice water to lower its temperature to 0°C, and then you put the spoon in the coffee. After thermal equilibrium has been reached, what is the final temperature of your coffee? Assume energy is exchanged only between the spoon and the coffee. The heat capacity of the metal spoon is 80 J/°C. Assume the specific heat and density of coffee is the same as that of water, 4.18 J/(g · °C) and 1.00 g/mL.
Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter5: Principles Of Chemical Reactivity: Energy And Chemical Reactions
Section: Chapter Questions
Problem 78GQ: Three 45-g ice cubes at 0 C are dropped into 5.00 102 mL of tea to make iced tea. The tea was...
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Transcribed Image Text:To cool your 250 mL of coffee at 90°C, you put a 100 g metal spoon in a glass of ice water to lower its
temperature to 0°C, and then you put the spoon in the coffee. After thermal equilibrium has been reached,
what is the final temperature of your coffee? Assume energy is exchanged only between the spoon and the
coffee. The heat capacity of the metal spoon is 80 J/°C. Assume the specific heat and density of coffee is
the same as that of water, 4.18 J(g · °C) and 1.00 g/mL.
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