A cup of fast-food coffee is 180°F when freshly poured. After 2 minutes in a room at 70°F, the coffee has cooled to 165°F. I. Calculate the constant of integration. II. What is the value of the proportionality constant? III. Find the time that it will take for the coffee to cool to 120°F.

A cup of fast-food coffee is 180°F when freshly poured. After 2 minutes in a room at 70°F, the coffee has cooled to 165°F. I. Calculate the constant of integration. II. What is the value of the proportionality constant? III. Find the time that it will take for the coffee to cool to 120°F.

Introductory Chemistry For Today

8th Edition

ISBN:9781285644561

Author:Seager

Publisher:Seager

Chapter1: Matter, Measurements, And Calculations

Section: Chapter Questions

Problem 1.85E

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Question

A cup of fast-food coffee is 180°F when freshly poured. After 2 minutes in a room at 70°F, the coffee has cooled to 165°F.

I. Calculate the constant of integration.

II. What is the value of the proportionality constant?

III. Find the time that it will take for the coffee to cool to 120°F.

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