Ch = sh = why and find the stuff
Explanation:
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Answer:
The enthalpy of combustion of ethanol in kJ/mol is -1419.58 kJ/mol.
Explanation:
The heat absorbed by the bomb and water is equal to the product of the heat capacity and the temperature change. Working with this equation, and assuming no heat is lost to the surroundings, we write
:
qcal= Ccal × ΔT= 490 J/K × 276.7 K= <u>135,583 J</u> = 135.58 kJ
Note we expressed the temperature change in K, because the heat capacity is written in K.
<u>
Now that we have the heat of combustion, we need to calculate the molar heat. </u>
Because qsystem = qrxn + qcal and qrxn = -qcal, the heat change of the reaction is -135.58 kJ.
This is the heat released by the combustion of 4.40 g of ethanol ; therefore, we can write the <u>conversion factor as 135.58 kJ/ 4.40 g</u>.
The molar mass of ethanol is 46.07 g, so the heat of combustion of 1 mole of ethanol is
:
molar heat of combustion= -135.58 kJ/4.40 g x 46.07 g/ 1 mol= -1419.58 kJ/mol
Therefore, the enthalpy of combustion of ethanol in kJ/mol is -1419.58 kJ/mol.
Answer:
What type of bonds are shown in this diagram?
A: covalent bonds
B: ionic bonds
C: hydrogen bonds
D: metallic bonds
(answer) metallic bonds
In what type of bonds do atoms join together because their opposite charges attract each other?
A: metallic bonds and covalent bonds
B: metallic bonds and ionic bonds
C: ionic bonds and covalent bonds
D: ionic bonds and hydrogen bonds
(answer) ionic bonds and hydrogen bonds
What types of bonds are shown in this diagram?
A: covalent bonds
B: ionic bonds
C: hydrogen bonds
D: metallic bonds
(answer) hydrogen bonds
Which statement best describes the types of bonds shown in the diagram?
A: an ionic bond; the hydrogen chloride molecule has an electrical charge
B: an ionic bond; a hydrogen ion is bonding with a chlorine atom
C: a covalent bond; the hydrogen atom’s two electrons are being shared with the chlorine atom
D: a covalent bond; the hydrogen atom’s single electron is being shared with the chlorine atom
(answer) a covalent bond; the hydrogen atom’s single electron is being shared with the chlorine atom
Which of the following bonds is the strongest?
A: hydrogen bonds
B: metallic bonds
C: valence bonds
D: covalent bonds
(answer)
Explanation:
UwU
They push away from each other or repel due to the same charge they have.
