A cup of hot coffee initially at 100°C cools to 90°C after 15 minutes in a room at TS = 65°C. T = (T0 – TS) e–kt + TS What is the value of the decay constant k? Question 8 options: 1.56 min–1 0.0224 min–1 0.381 min–1 What is the coffee temperature after 60 minutes? Question 9 options: 74.1°C 81.0°C 77.3°C How much time is required for the coffee to cool to 80°C? Question 10 options: 42.8 minutes 37.8 minutes 32.3 minutes
A cup of hot coffee initially at 100°C cools to 90°C after 15 minutes in a room at TS = 65°C. T = (T0 – TS) e–kt + TS What is the value of the decay constant k? Question 8 options: 1.56 min–1 0.0224 min–1 0.381 min–1 What is the coffee temperature after 60 minutes? Question 9 options: 74.1°C 81.0°C 77.3°C How much time is required for the coffee to cool to 80°C? Question 10 options: 42.8 minutes 37.8 minutes 32.3 minutes
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter19: The Nucleus: A Chemist's View
Section: Chapter Questions
Problem 8Q
Related questions
Question
A cup of hot coffee initially at 100°C cools to 90°C after 15 minutes in a room at TS = 65°C.
T = (T0 – TS) e–kt + TS
What is the value of the decay constant k?
Question 8 options:
|
|
1.56 min–1 |
|
|
0.0224 min–1 |
|
|
0.381 min–1 |
What is the coffee temperature after 60 minutes?
Question 9 options:
|
|
74.1°C |
|
|
81.0°C |
|
|
77.3°C |
How much time is required for the coffee to cool to 80°C?
Question 10 options:
|
|
42.8 minutes |
|
|
37.8 minutes |
|
|
32.3 minutes |
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