Author Question: When 1.0 kg of steam at 100C condenses to water at 100C, what is the change in entropy of the steam? ... (Read 72 times)

TFauchery · **on:** Jul 29, 2018

When 1.0 kg of steam at 100C condenses to water at 100C, what is the change in entropy of the steam? The latent heat of vaporization of water is 22.6 105 J/kg.

A) zero
B) 6.1 103 J/K
C) -6.1 103 J/K
D) 22.6 105 J/K
E) -22.6 105 J/K

Question 2

At a distance of 15.0 m from a sound source, the intensity level is 60.0 dB. What is the intensity level (in decibels) at a point 2.00 m from the source if the source radiates equally in all directions?

A) 55.7 dB
B) 57.5 dB
C) 75.5 dB
D) 77.5 dB