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Author Question: A 44.0-g block of ice at -15.0C is dropped into a calorimeter (of negligible heat capacity) ... (Read 125 times)

RRMR

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on: Jul 29, 2018
A 44.0-g block of ice at -15.0C is dropped into a calorimeter (of negligible heat capacity) containing 100g of water at 5.0C.
 
  When equilibrium is reached, how much of the ice will have melted? The specific heat of ice is 2090 J/kg  K, that of water is 4186 J/kg  K, and the latent heat of fusion of water is 33.5  104 J/kg. A) 2.1 g
  B) 21 g
  C) 5.2 g
  D) 52 g
  E) 4.4 g

Question 2

A 29.0-pm-wavelength photon is scattered by a stationary electron.
 
  What is the maximum energy loss the photon can have? (melectron = 9.11  10-31 kg, c = 3.00  108 m/s, h = 6.626  10-34 J  s, 1 eV = 1.60  10-19 J)
  A) 15 keV B) 4.0 keV C) 6.1 keV D) 10 keV E) 12 keV


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mcni194

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

A

Answer to Question 2

C


RRMR

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Reply 2 on: Jul 29, 2018
Gracias!

upturnedfurball

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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