Answer:
Mass of copper vaporized is 52,8g
Explanation:
The heat of vaporization (ΔHvap) is defined as the amount of energy you require to transform a quantity of liquid in gas. The formula is:
Q = ΔHvap×mass
Where Q is the amount of heat and mass is the mass of the compound.
If you required 254 kJ to vaporize a sample of copper which heat of vaporization is 4,81 kJ/g:
254kJ = 4,81 kJ/g × mass of copper
<em>52,8g = mass of copper</em>
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I hope it helps!
Answer:
No, he is not.
Explanation:
When he let the rubber band go, the band compresses, so there's elastic potential energy in it, which will be transformed into kinetic energy when it gains velocity and flies across the room.
Then, Elias had inverted the concepts: the experiment demonstrates the transformation of elastic potential energy to kinetic energy.
Answer:
- In the angles between faces
- The number of edges of equal length
Explanation:
There are 14 Crystal systems available
They are divided into three parts
- FCC(Face centred cubic)
- BCC(Body centred cubic)
- ECC(Edge centred cubic)
Answer:
Heat of solution= - 63KJ/mole
Heat evolved = - 18.82KJ
Explanation:Heat of solution = Heat of solute + Heat of hydration
◇Hsoln = - ( - 7.3 × 10 ^ 2) + ( - 793 ) KJ / mol
◇H soln= - 63 KJ
Use enthalpy of solution equation to determine the enthalpy of solution for LiI
LiI ---> Li^ + + I^-
Molecular mass of LiI=133.85g
The chemical equation for the dissociation will be:
40gLiI (1molLiI)/133.85g LiI - 63KJ/1 mol LiI
18.82KJ
The heat was evolved because the value of enthalpy was negative