A 52.8-g sample of glucose (a nondissociated, nonvolatile solute with the formula C6H12O6) is dissolved in 158.0 g of water. Wha
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Answer :
The enthalpy of reaction is, -187.6 kJ/mol
The total heat will be, -2251 kJ
Explanation :
According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.
According to this law, the chemical equation can be treated as ordinary algebraic expression and can be added or subtracted to yield the required equation. That means the enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.
(a) The formation of will be,
The intermediate balanced chemical reaction will be,
(1)
(2)
(3)
We are multiplying equation 1 by 2 and then adding all the equations, we get :
(b) The expression for enthalpy of reaction will be,
Therefore, the enthalpy of reaction is, -187.6 kJ/mol
(c) Now we have to calculate the total heat.
or,
where,
= enthalpy change = -187.6 kJ/mol
q = heat = ?
n = number of moles of coal =
Now put all the given values in the above formula, we get:
Thus, the total heat will be, -2251 kJ
The ionic character of any compound depend on the lattice energy as well as the electronegativity of element present in that compound.
More would be the lattice energy more would be ionic nature of that compound.
The lattice energy of any compound is inversely proportional to the ionic radii cation and anion.
In given case the ionic radii of oxide in both oxides would be equal therefore the lattice energy only depend on the ionic radii of cation.
As the radii of Magnesium less then radii of lithium therefore lattice energy of Magnesium oxide would be more than lithium oxide.
Hence, MgO would be more ionic in nature than
Answer: the empirical formula is C3H4O3
Explanation:Please see attachment for explanation
