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Author Question: What is the entropy change of 450 g of water when it changes from (a) liquid to steam at its usual ... (Read 88 times)

laurencescou

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on: Jul 29, 2018
What is the entropy change of 450 g of water when it changes from (a) liquid to steam at its usual boiling point and (b) ice to liquid at its usual melting point? For water, LF = 0.334 MJ/kg, LV = 2.26 MJ/kg.
 
  What will be an ideal response?

Question 2

The wavelength of an electromagnetic wave is 600 nm. What is its frequency? (c = 3.0  108 m/s)
 
  A) 200  1012 Hz
  B) 300  1012 Hz
  C) 400  1012 Hz
  D) 500  1012 Hz
  E) 600  1012 Hz


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juwms

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Reply #1 on: Jul 29, 2018
Answer to Question 1

(a) 2.73 kJ/K (b) 549 J/K

Answer to Question 2

D


laurencescou

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Reply #2 on: Jul 29, 2018
Thanks


juwms

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Reply #3 on: Jul 29, 2018
Welcome :)


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