Answer:
The internal energy is the total amount of kinetic energy and potential energy of all the particles in the system. ... When the substance melts or boils, energy is put in to breaking the bonds that are holding particles together, which increases the potential energy.
Explanation:
Answer:
640.32 g
Explanation:
2KClO₃ → 2KCl + 3O₂
First we <u>convert KClO₃ moles to O₂ moles,</u> using the <em>stoichiometric coefficients</em>:
- 13.34 mol KClO₃ *
= 20.01 mol O₂
Then we <u>convert O₂ moles to grams</u>, using its <em>molar mass</em>:
- 20.01 mol O₂ * 32 g/mol = 640.32 g
So 640.32 g of O₂ are formed from 13.34 moles of KClO₃.
Covalent compounds are held together with an intra molecular attraction which is weaker than metallic bond
hence covalent compounds exist as liquids, gases and soft solids
<h3>
Answer:</h3>
59.87 kJ
<h3>
Explanation:</h3>
In the question , we are given;
- Molar heat of Vaporization as 10.79 kJ/mol
- Mass of water at 100°C is 100 g
We are required to calculate the amount of heat energy absorbed to convert water at 100°C to steam at 100°C.
- The process of converting water from liquid state to solid state without change in temperature is known as condensation.
- We are given the molar heat of vaporization as 10.79 kJ/mol, this means 1 mole of water will absorb 10.79 kJ when converted to ice without change in temperature.
- Therefore, we can first calculate the number of moles of water;
Moles = Mass ÷ Molar mass
Molar mass of water = 18.02 g/mol
Moles of water = 100 g ÷ 18.02 g/mol
= 5.549 moles
But;
Q = n × ΔHv , where n is the number of moles and ΔHv molar heat of Vaporization.
Therefore;
Q = 5.549 moles × 10.79 kJ/mol
= 59.874 kJ
= 59.87 kJ
Thus, the amount of heat absorbed is 59.87 kJ
