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Author Question: Calculate the change internal energy (E) for a system that is giving off 45.0 kJ of heat and is ... (Read 35 times)

Diane

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on: Aug 27, 2018
Calculate the change internal energy (E) for a system that is giving off 45.0 kJ of heat and is performing 855 J of work on the surroundings.
 
  A) 44.1 kJ
  B) -44.1 kJ
  C) -45.9 kJ
  D) 9.00  102 kJ
  E) -9.00  102 kJ

Question 2

When covalent bonds are broken energy is released.
 
  Indicate whether the statement is true or false


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aruss1303

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Reply #1 on: Aug 27, 2018
Answer to Question 1

C

Answer to Question 2

FALSE


Diane

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Reply #2 on: Aug 27, 2018
Thanks


aruss1303

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Reply #3 on: Aug 27, 2018
Welcome :)


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When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

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