Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Question
A thermometer is taken from a room where the temperature is 18°C to the outdoors, where the temperature is -12°C. After one minute the thermometer reads 9°C. (a) What will the reading on the thermometer be after 3 more minutes? -1.7 (b) When will the thermometer read -11°C? minutes after it was taken to the outdoors.
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Transcribed Image Text:A thermometer is taken from a room where the temperature is 18°C to the outdoors, where the temperature is -12°C. After one minute the thermometer reads 9°C. (a) What will the reading on the thermometer be after 3 more minutes? -1.7 (b) When will the thermometer read -11°C? minutes after it was taken to the outdoors.
Expert Solution
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Step 1: Given details

The rate at which a body’s temperature changes is directly proportional to the temperature difference between the body and its surroundings.

The formula for the Newton's law of cooling is expressed as bold italic T bold italic left parenthesis bold italic t bold italic right parenthesis bold italic equals bold italic T subscript bold italic S bold italic plus bold italic left parenthesis bold italic T subscript bold italic o bold italic minus bold italic T subscript bold italic s bold italic right parenthesis bold italic e to the power of bold italic minus bold italic lambda bold italic t end exponent bold italic rightwards arrow bold italic left parenthesis bold italic 1 bold italic right parenthesis

Here,T(t) is the temperature of the object at a certain time t

Ts is the temperature of the surroundings.  To is the initial temperature and lambda is the cooling constant.

Provided, temperature of the surroundings(Ts) is -12oC     and    initial temperature is 18oC(To)

 After one minute the thermometer reads 9 degrees C. i.e.bold italic t subscript bold italic 60 bold italic space bold italic s bold italic e bold italic c end subscript bold italic equals bold italic 9 to the power of bold italic o bold italic C



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Entered -1.72 9.53 Answer Preview At least one of the answers above is NOT correct. -1.72 9.53 Result (b) When will the thermometer read -11°C? 9.53 minutes after it was taken to the outdoors. incorrect correct A thermometer is taken from a room where the temperature is 18°C to the outdoors, where the temperature is -12°C. After one minute the thermometer reads 9°C. (a) What will the reading on the thermometer be after 3 more minutes? -1.72
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Transcribed Image Text:Entered -1.72 9.53 Answer Preview At least one of the answers above is NOT correct. -1.72 9.53 Result (b) When will the thermometer read -11°C? 9.53 minutes after it was taken to the outdoors. incorrect correct A thermometer is taken from a room where the temperature is 18°C to the outdoors, where the temperature is -12°C. After one minute the thermometer reads 9°C. (a) What will the reading on the thermometer be after 3 more minutes? -1.72
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Entered -4.79 9.53 Answer Preview At least one of the answers above is NOT correct. -4.79 9.53 Result incorrect correct A thermometer is taken from a room where the temperature is 18°C to the outdoors, where the temperature is -12°C. After one minute the thermometer reads 9°C. (a) What will the reading on the thermometer be after 3 more minutes? -4.79 (b) When will the thermometer read -11°C? 9.53 minutes after it was taken to the outdoors.
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Transcribed Image Text:Entered -4.79 9.53 Answer Preview At least one of the answers above is NOT correct. -4.79 9.53 Result incorrect correct A thermometer is taken from a room where the temperature is 18°C to the outdoors, where the temperature is -12°C. After one minute the thermometer reads 9°C. (a) What will the reading on the thermometer be after 3 more minutes? -4.79 (b) When will the thermometer read -11°C? 9.53 minutes after it was taken to the outdoors.
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Follow-up Questions
Read through expert solutions to related follow-up questions below.
Follow-up Question
Entered -1.72 9.53 Answer Preview At least one of the answers above is NOT correct. -1.72 9.53 Result (b) When will the thermometer read -11°C? 9.53 minutes after it was taken to the outdoors. incorrect correct A thermometer is taken from a room where the temperature is 18°C to the outdoors, where the temperature is -12°C. After one minute the thermometer reads 9°C. (a) What will the reading on the thermometer be after 3 more minutes? -1.72
expand button
Transcribed Image Text:Entered -1.72 9.53 Answer Preview At least one of the answers above is NOT correct. -1.72 9.53 Result (b) When will the thermometer read -11°C? 9.53 minutes after it was taken to the outdoors. incorrect correct A thermometer is taken from a room where the temperature is 18°C to the outdoors, where the temperature is -12°C. After one minute the thermometer reads 9°C. (a) What will the reading on the thermometer be after 3 more minutes? -1.72
Solution
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Follow-up Question
Entered -4.79 9.53 Answer Preview At least one of the answers above is NOT correct. -4.79 9.53 Result incorrect correct A thermometer is taken from a room where the temperature is 18°C to the outdoors, where the temperature is -12°C. After one minute the thermometer reads 9°C. (a) What will the reading on the thermometer be after 3 more minutes? -4.79 (b) When will the thermometer read -11°C? 9.53 minutes after it was taken to the outdoors.
expand button
Transcribed Image Text:Entered -4.79 9.53 Answer Preview At least one of the answers above is NOT correct. -4.79 9.53 Result incorrect correct A thermometer is taken from a room where the temperature is 18°C to the outdoors, where the temperature is -12°C. After one minute the thermometer reads 9°C. (a) What will the reading on the thermometer be after 3 more minutes? -4.79 (b) When will the thermometer read -11°C? 9.53 minutes after it was taken to the outdoors.
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