Answer:
52.08grams
Explanation:
Heat of fusion is the energy needed to transform solid water into liquid water. Hess's Law.
The temperature change Liquid water to Solid Ice. 20 degrees C --> 0 degrees C. is 20 degree C.
The heat needed for this is = 4.184 J/(g*C) * (36 grams of water) * 20 degrees C = 3012 joules of energy.
Liquid water to solid water.
Heat of fusion of water is 335j/g = 6.02kJ/mol
The heat needed for this is 6.02 kJ/mol * 2 moles of water = 12.04 kJ = 12040 joules of energy.
Adding the two energies, we have a total energy iof 15052 joules.
15052 joules = H(vap of CCl2F2) * grams of CCl2F2 needed = 289 J/g * x grams 15052 / 289 = 52.08 grams needed.
Setting up the equation, you get
Therefore, the equation is 
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Answer: What is one source of thermal energy in the interior of the Earth?
Explanation:
Answer:
1.9×10^20
Explanation:
ϕ = number of reaction events /number of photons absorbed
ϕ= 0.26
Energy= power× time
885×10^-3×10×60= 531J
But E= nhc/λ
n= number of photons
h= planks constant
c= speed of light
λ= wavelength
n= Eλ/hc
n= 531×280×10^-9/6.6×10^-34 ×3×10^8
n= 7.5×10^20
Therefore
From
ϕ = number of reaction events /number of photons absorbed
Number of reaction events= 0.26×7.5×10^20
= 1.95×10^20
