First ionization energy

Chemistry

1 answer:

Andru [333]4 years ago

7 0

Answer:

The first ionization energy is defined as

Energy which is required to pull out one mole of the outermost shell's electrons in a neutral atom from one mole of gaseous atoms to produce 1 mole of gaseous ions each with a charge of 1+.
$A\to A^++ e^{-}$ , where A is any neutral atom.
In the periodic table, Its value decreases from top to bottom in groups and increases from left to right across a particular period.
Helium has the largest first ionization energy.
Francium has one of the lowest.

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Using the following thermochemical equation, determine the amount of heat produced from the combustion of 24.3 g benzene (C6H6).

Anna007 [38]

Answer:

ΔH = -976.5 kJ

Explanation:

For the reaction given, there are 2 moles of benzene (C6H6). The heat of this reaction is -6278 kJ, which means that the combustion of 2 moles of benzene will lose 6278 kJ of heat. It is an exothermic reaction.

The value of ΔH, the enthalpy, is a way of measurement of the heat, and it depends on the quantity of the matter (number of moles).

So, 24.3 g of benzene has :

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0.311 moles ----------- x

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3 years ago