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A student immerse one end of the ice-water mixture at 0 C. The side of the rod is insulated. After steady state condition have been achieve in the...

1.A student immerse one end of the ice-water mixture at 0 C. The side of the rod is insulated. After steady state condition have been achieve in the rod, 0.16 kg of ice melt in a certain time interval. For water, latent heat is 3.34*10^5 J/kg. for this time interval:
a) the entropy change of the boiling water
b) the total entropy change of the entire system

2.Smoke particles in the air typically have masses of the order of 10-16 kg. The Brownian motion (rapid, irregular movement) of these particles, resulting from collisions with air molecules, can be observed with a microscope.
(a) Find the root-mean-square speed of Brownian motion for a particle with a mass of 3.00 X 10-16 kg in air at 300 K.
(b) Would the root-mean-square speed be different if the particle were in hydrogen gas at the same temperature? Explain.
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This question was asked on Jan 08, 2013.

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