jamesgraham577
13.11.2019 •
Chemistry
Match the following vocabulary words.
angle of incidence
index of refraction
mirage
the ratio of the speed of light in a vacuum to its speed in
some medium
the total reflection of light from a high index of refraction to
low index of refraction
3. the angle formed by an incident ray and the normal
the image produced as light travels from cool air through
warm air and is bent
5. a line perpendicular to a surface
the image produced as light travels from warm air through
cool air and is bent
normal
looming
total internal reflection
Solved
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Ответ:
4.255 J/ K
Explanation:
Given data :
mass of Gallium = 16 gm
molar mass = 69.723 g/mol
hence no of moles = 16 / 69.723 = 0.23 moles ( 1 )
Δh ( heat fusion ) = 5.59 KJ/mol
Temperature = 29.8°C = 302.8 k
Determine the entropy change of gallium
Δs ( entropy change ) = heat fusion / temperature
= ( 5.59 * 1000) J/mol / 302.8 = 18.46 J/k*mol
Hence entropy change of gallium
= Δs * no of Gallium moles
= 18.46 * 0.23 = 4.255 J/ k
I hope this is right haha