Answer: Hsub=Hfus+Hvap
Explanation:
The molar heat of vaporization measured in kilojoules per mole, or kJ/mol is the energy needed to make vapor one mole of a liquid. .
The molar heat of sublimation measured in kilojoules per mole, or kJ/mol is the energy needed to sublime one mole of a solid,
the molar heat of fusion measured in kilojoules per mole, or kJ/mol is the energy needed to melt one mole of a solid.
Hess law helps to explain the relationship in physical chemistry stating that the total enthalpy change during the complete course of a reaction is the same whether the reaction is made in one step or in several steps.
In this context Hess’s law helps to see the several steps involved as the heat of sublimation energy is equal to the sum of vaporization energy and fusion energy.
Answer/Explanation:
62.559%
mass of an element X 100%
mass of the compound
Scientific Notation: 3.45 x 10^5
E Notation: 3.45e5
Answer:
Explanation:
liquid only is the matter which has a definite volume and takes the shape of its container
Answer:
The weight of ammonium phosphate is 10 gm
Explanation:
The chemical reaction of ammonium phosphate formation is as follows.
![3NH_{3}+H_{3}PO_{4} \rightarrow [(NH_{4})_{3}PO_{4}]](https://tex.z-dn.net/?f=3NH_%7B3%7D%2BH_%7B3%7DPO_%7B4%7D%20%5Crightarrow%20%5B%28NH_%7B4%7D%29_%7B3%7DPO_%7B4%7D%5D)
From the reaction one mole of phosphoric acid is equivalent to the one mole of ammonium phosphate.
So, "n" mole of phosphoric acid is equivalent to the "n" mole of ammonium phosphate.
Number of moles in 7.1 grams of phosphoric acid = 

<u>Formation weight of ammonium phosphate :</u>
Weight of ammonium phosphate = 

Round the answer to 2 significant digits
Weight of ammonium phosphate = 10 gm