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1 answer:
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Answer:
see explanation below
Explanation:
The question is incomplete. The missing parts are a) determine the electrophylic site. b) determine the nucleophylic site.
In order to do this, we need to write the reaction and do the mechanism. The nucleophylic site will be the site where the nucleophyle attacks to form the product. In this case the site is the carbon next to the bromine. In this place the Oxigen which is the nucleophyle goes. The electrophyle is the site where one atom substract to complete it's charges. In this case, the electrophyle is usually the hydrogen, so the site will be next to the oxygen after the nucleophyle attack.
You can see it better in the attached picture.
Answer : The energy evolved when it burned was,
Solution :
First we have to calculate the moles of hydrogen gas by using ideal gas equation.
where,
P = pressure of gas = 1 atm
V = volume of gas =
T = temperature of gas =
R = gas constant = 0.0821 Latm/moleK
n = number of moles of gas
Now put all the given values in the above formula, we get the moles of hydrogen gas.
Now we have to calculate the amount of energy evolved.
The combustion reaction of hydrogen will be,
The enthalpy of combustion of hydrogen is -286 KJ/mole. (standard value)
As 1 mole of hydrogen gas burned it evolved energy = -286 KJ
So, of hydrogen gas burned it evolved energy =
Therefore, the energy evolved when it burned was,