To Cool Your 250 ML of Coffee at 90C

question 135

Short Answer

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 are the same as that of water, 4.18 J/(g  C) and 1.00 g/mL.

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Definitions:

Denial

A defense mechanism in which confrontation with a reality or fact is avoided by denying the existence of the problem or reality.

Bottoming Out

Hitting the lowest point in a declining situation, often leading to a moment of clarity or change in direction.

Experimenting

The act of conducting tests or trials to discover something unknown or test a principle.

OD Interventions

Actions and activities planned as part of organizational development to improve the organization's effectiveness.